o
    Rcy                     @   sr  d Z ddlZddlmZ ddlZddlZddlZddlZddlZddl	Z	ddl
Z
ddlZddlZddlmZ ddlmZ ddlmZ d	d
 ZG dd deZdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd  Zdd!d"ZG d#d$ d$eZd%d& Z dd'd(Z!d)d* Z"dd,d-Z#dd/d0Z$dd1d2Z%	3	3	3dd4d5Z&d6d7 Z'd8d9 Z(dd:d;Z)G d<d= d=eZ*d>d? Z+d@dA Z,			B	ddCdDZ-dEdF Z.ddGdHZ/G dIdJ dJeZ0dKdL Z1G dMdN dNeZ2G dOdP dPeZ3dQdR Z4dSdT Z5dUdV Z6ddWdXZ7dYdZ Z8d[d\ Z9d]d^ Z:dd_d`Z;dadb Z<dcdd Z=G dedf dfe>Z?G dgdh dheZ@G didj djeZAG dkdl dleBZCdmeC_DG dndm dmeZEdaFdodp ZGdqdr ZHddtduZIG dvdw dwejJZKddxdyZLdzd{ ZMdd|d}ZNd~d ZOePdZQePdZReReQfddZSeTdZUdd ZVG dd deTZWdd ZXdd ZYdd ZZdd Z[dd Z\ePdZ]dd Z^dd Z_dd Z`dS )zRoutines to help with the creation, loading and introspection of
modules, classes, hierarchies, attributes, functions, and methods.

    Nupdate_wrapper   )_collections)compat   )excc                 C   s*   t jr| d} t }||  | S )Nzutf-8)r   py3kencodehashlibmd5update	hexdigest)xm r   =D:\Flask\env\Lib\site-packages\sqlalchemy/util/langhelpers.pymd5_hex   s
   

r   c                   @   s.   e Zd ZdZdZdddZdd Zdd	 Zd
S )safe_reraiseaK  Reraise an exception after invoking some
    handler code.

    Stores the existing exception info before
    invoking so that it is maintained across a potential
    coroutine context switch.

    e.g.::

        try:
            sess.commit()
        except:
            with safe_reraise():
                sess.rollback()

    )	warn_only	_exc_infoFc                 C   s
   || _ d S N)r   )selfr   r   r   r   __init__:      
zsafe_reraise.__init__c                 C   s   t  | _d S r   )sysexc_infor   r   r   r   r   	__enter__=      zsafe_reraise.__enter__c                 C   s   |d u r| j \}}}d | _ | jstj||d d S d S tjs4| j r4| j d r4td| j d | j d f  d | _ tj||d d S )N)with_tracebackr   zfAn exception has occurred during handling of a previous exception.  The previous exception is:
 %s %s
r   )r   r   r   Zraise_r	   warn)r   type_value	tracebackexc_type	exc_valueexc_tbr   r   r   __exit__@   s"   
zsafe_reraise.__exit__NF)__name__
__module____qualname____doc__	__slots__r   r   r(   r   r   r   r   r   &   s    
r   c                 c   sN    t  }| g}|r%| } | |v rq||  ||   | V  |s	d S d S r   )setpopaddextend__subclasses__)clsseenstackr   r   r   walk_subclassesW   s   
r7   c                 C   s6   t | tjr| S zt| W S  ty   d|   Y S w )Nzunprintable element %r)
isinstancer   string_typesstr	Exception)elementr   r   r   string_or_unprintablee   s   
r=   c                 C   s   d dd td| jD S )N c                 s   s    | ]}|  V  qd S r   )lower).0nr   r   r   	<genexpr>p   s    
z(clsname_as_plain_name.<locals>.<genexpr>z([A-Z][a-z]+))joinrefindallr*   )r4   r   r   r   clsname_as_plain_nameo   s   
rF   c                 C   s.   t | ts	| j}n| }|j}t||}||kS )z1Return True if the two class methods don't match.)r8   type	__class__r*   getattr)Zinstance_or_clsZagainst_methodZcurrent_clsmethod_nameZcurrent_methodr   r   r   method_is_overriddenu   s   

rK   c                 C   s>   g }| j | j| jfD ]}t|dr| }|| q
t|S )zrdecode a slice object as sent to __getitem__.

    takes into account the 2.5 __index__() method, basically.

    	__index__)startstopstephasattrrL   appendtuple)Zslcretr   r   r   r   decode_slice   s   
rT   c              	   '   sl    t | } |D ], t ft fddtd}|D ]}|| vr,| | |V   nqtd  qd S )Nc                    s    t |  S r   )r:   )ibaser   r   <lambda>   s    z!_unique_symbols.<locals>.<lambda>i  z&exhausted namespace for symbol base %s)r/   	itertoolschainr   Zitertools_imapranger1   	NameError)usedbasespoolsymr   rV   r   _unique_symbols   s    
ra   c                 c   s2    |r|| d @ }| |V  ||N }|sdS dS )z6Call the given function given each nonzero bit from n.r   Nr   )fnrA   br   r   r   map_bits   s   
rd   c                        fdd}t | S )z'A signature-matching decorator factory.c           	         s   t | st | stdt| }i }t||}t|d |dd  | jf }t	|dd\}}t
||d}|t|dd	 | j|d
< d| }|| || d| ji t||| j}t| d| j|_| |_t|| S )Nznot a decoratable functionr   r      targetrb   )rg   rb   FgroupednamezDdef %(name)s(%(args)s):
    return %(target)s(%(fn)s, %(apply_kw)s)
r*   __func__)inspect
isfunctionismethodr;   r   inspect_getfullargspec!_update_argspec_defaults_into_envrR   r*   ra   dictr   format_argspec_plusr+   _exec_code_in_envrI   __defaults____wrapped__r   )	rb   specenvnamesZ	targ_namefn_namemetadatacode	decoratedrg   r   r   decorate   s&   

 

zdecorator.<locals>.decorater   )rg   r~   r   r}   r   	decorator   s   
r   c                 C   sx   | j r:g }d}| j D ] }t|jdvr%d| }|||< || |d7 }q
|| q
t| }t||d< tj| S | S )zCgiven a FullArgSpec, convert defaults to be symbol names in an env.r   )builtins__builtin__zx%dr   rf   )defaultsrG   r+   rQ   listrR   r   FullArgSpec)rv   rw   Znew_defaultsrU   argrj   elemr   r   r   rp      s   



rp   c                 C   s   t | | || S r   )exec)r{   rw   ry   r   r   r   rs      s   
rs   c                 C   sz  t | tr| j}| }d|r|nd| j |f }n|  }}d| }|dd }t|}|d d= t|dd}||d	< d
| }	|t|j	d}
t
|	|
 |
| }t|drw|j\}}|j}|du rhd| j	| jf }t|d|||f d}||_n|j|_d|ddd  |_	|j	tjvrtd|j	f tjst|dr||j_t|jds||f|j_|S ||_t|ds||f|_|S )zProduce a wrapping function for the given cls or classmethod.

    Rationale here is so that the __init__ method of the
    class can serve as documentation for the function.

    zConstruct a new :class:`%s` object. 

This constructor is mirrored as a public API function; see :func:`sqlalchemy%s` for a full usage and argument description.z.%szSThis function is mirrored; see :func:`sqlalchemy%s` for a description of arguments..r   Frh   rj   z5def %(name)s(%(args)s):
    return cls(%(apply_kw)s)
)r4   symbolr*   
_linked_toNz%s.%sz.. container:: inherited_member

    This documentation is inherited from :func:`sqlalchemy%s`; this constructor, :func:`sqlalchemy%s`,   creates a :class:`sqlalchemy%s` object.  See that class for additional details describing this subclass.r   
sqlalchemyz0public_factory location %s is not in sys.modulesrk   )r8   rG   r   r*   splitr   ro   rr   r   r+   r   rP   r   r-   inject_docstring_textrsplitr   modulesImportErrorpy2krk   )rg   locationZclass_locationrb   Z	callable_docZlocation_namerv   rz   r{   rw   r|   Z	linked_toZlinked_to_locationZlinked_to_docr   r   r   public_factory   sv   








r   c                   @   .   e Zd Zd
ddZdd Zdd Zdd	 ZdS )PluginLoaderNc                 C   s   || _ i | _|| _d S r   )groupimplsauto_fn)r   r   r   r   r   r   r   @  s   
zPluginLoader.__init__c                 C   s   | j   d S r   )r   clearr   r   r   r   r   E  r   zPluginLoader.clearc                 C   s   || j v r| j |  S | jr| |}|r|| j |< | S t| jD ]}|j|kr6|j| j |< |   S q#td| j|f )NzCan't load plugin: %s:%s)	r   r   r   Zimportlib_metadata_getr   rj   loadr   ZNoSuchModuleError)r   rj   loaderimplr   r   r   r   H  s   



zPluginLoader.loadc                    s    fdd}|| j |< d S )Nc                     s6   t  }  ddd  D ]}t| |} qt| S )Nr   r   )r   import_r   rI   )modtoken
modulepathobjnamer   r   r   \  s   

z#PluginLoader.register.<locals>.load)r   )r   rj   r   r   r   r   r   r   register[  s   zPluginLoader.registerr   )r*   r+   r,   r   r   r   r   r   r   r   r   r   ?  s
    
r   c                 C   sh   zt j}W n ty   t| }|d t|d f Y S w | j}|j}t|j	d | t|j
|@ fS )Nr   r   )rl   CO_VARKEYWORDSAttributeErrorr   ro   bool__code__co_argcountr   co_varnamesco_flags)rb   Zco_varkeywordsrv   conargsr   r   r   _inspect_func_argse  s   

	r   c                 C   s   |du }|r	t  }| jdd}|ot|tjot|jtj}|r2t|\}}|	| |s2|s2dS |r6|rE| j
D ]}t||du rD nq9|d |S )ae  Return the full set of inherited kwargs for the given `cls`.

    Probes a class's __init__ method, collecting all named arguments.  If the
    __init__ defines a \**kwargs catch-all, then the constructor is presumed
    to pass along unrecognized keywords to its base classes, and the
    collection process is repeated recursively on each of the bases.

    Uses a subset of inspect.getfullargspec() to cut down on method overhead,
    as this is used within the Core typing system to create copies of type
    objects which is a performance-sensitive operation.

    No anonymous tuple arguments please !

    Nr   Fr   )r/   __dict__getr8   typesFunctionTyper   CodeTyper   r   	__bases__get_cls_kwargsdiscard)r4   _settoplevelZctrZhas_initrx   Zhas_kwcr   r   r   r   y  s*   



r   c                 C   s   t | d S )zReturn the set of legal kwargs for the given `func`.

    Uses getargspec so is safe to call for methods, functions,
    etc.

    r   )r   ro   )funcr   r   r   get_func_kwargs  s   r   Fc              	   C   s0  t | rtd|  t | r4|r/|r/t| }t|jdd |j|j	|j
|j|j|jS t| S t | rb|r\|s@| jr\t| j}t|jdd |j|j	|j
|j|j|jS t| jS t | rot| j|ddS t| drzt| jS t| drt | jrt| j|dS td	|  td	|  )
zReturn the argument signature for any callable.

    All pure-Python callables are accepted, including
    functions, methods, classes, objects with __call__;
    builtins and other edge cases like functools.partial() objects
    raise a TypeError.

    zCan't inspect builtin: %sr   NT)no_self_is_initrk   __call__)r   zCan't inspect callable: %s)rl   	isbuiltin	TypeErrorrm   r   ro   r   argsvarargsvarkwr   
kwonlyargskwonlydefaultsannotationsrn   __self__rk   isclassget_callable_argspecr   rP   r   )rb   r   r   rv   r   r   r   r     sN   
	








r   Tc              	   C   s  t | rt | }n| }t j| }t |d |d |d d|d }|d rC|d d }t |d dd |d |d d|d }n|d rPd|d  }|}nd}|}d}|d rb|t|d 7 }|d rn|t|d 7 }|d |d  }|r|d| d }	nd}	t j||d |d |	d	d
 d}
|d rt j|dd |d |d |	dd
 d}n|
}|rt||||
||dS t|dd ||dd |
dd |dd |dd dS )a   Returns a dictionary of formatted, introspected function arguments.

    A enhanced variant of inspect.formatargspec to support code generation.

    fn
       An inspectable callable or tuple of inspect getargspec() results.
    grouped
      Defaults to True; include (parens, around, argument) lists

    Returns:

    args
      Full inspect.formatargspec for fn
    self_arg
      The name of the first positional argument, varargs[0], or None
      if the function defines no positional arguments.
    apply_pos
      args, re-written in calling rather than receiving syntax.  Arguments are
      passed positionally.
    apply_kw
      Like apply_pos, except keyword-ish args are passed as keywords.
    apply_pos_proxied
      Like apply_pos but omits the self/cls argument

    Example::

      >>> format_argspec_plus(lambda self, a, b, c=3, **d: 123)
      {'args': '(self, a, b, c=3, **d)',
       'self_arg': 'self',
       'apply_kw': '(self, a, b, c=c, **d)',
       'apply_pos': '(self, a, b, c, **d)'}

    r   r   r   N   z%s[0]rf   r   c                 S      d|  S N=r   r   r   r   r   rX   3      z%format_argspec_plus.<locals>.<lambda>)formatvaluec                 S   r   r   r   r   r   r   r   rX   <  r   )r   self_arg	apply_posapply_kwapply_pos_proxiedapply_kw_proxiedr   )r   callablero   inspect_formatargspeclenrq   )rb   ri   rv   r   r   r   r   num_defaultsZ	name_argsZdefaulted_valsr   r   r   r   r   rr     sv   
"
"
	




rr   c                 C   sr   | t ju r|r	dnd}|rdnd}nzt| |dW S  ty.   |r$dnd}|r*dnd	}Y nw td|||||d
S )a  format_argspec_plus with considerations for typical __init__ methods

    Wraps format_argspec_plus with error handling strategies for typical
    __init__ cases::

      object.__init__ -> (self)
      other unreflectable (usually C) -> (self, *args, **kwargs)

    z(self)r   z() rh   z(self, *args, **kwargs)zself, *args, **kwargsz(*args, **kwargs)z*args, **kwargs)r   r   r   r   r   r   )objectr   rr   r   rq   )methodri   r   Zproxiedr   r   r   format_argspec_initU  s(   

r   r   c                    s    fdd}|S )zA class decorator that will copy attributes to a proxy class.

    The class to be instrumented must define a single accessor "_proxied".

    c                    s   d	fdd	}fdd}D ]}t | |r"td| |f t| ||| q D ]}t | |r<td| |f t| ||| q-D ]}t | |rVtd| |f t| |||dd qG| S )
NFc           	         s   t | }t|}d|ji}t||}t|dd}|j|d |d |d |d d}|r6d	| }|d
< nd| }t|||j}t |d|j|_t	|j
d f d|_
|r[t|}|S )Nr*   Frh   r   r   r   r   )rj   r   r   r   r   zLdef %(name)s(%(args)s):
    return target_cls.%(name)s(%(apply_kw_proxied)s)
target_clszWdef %(name)s(%(args)s):
    return %(self_arg)s._proxied.%(name)s(%(apply_kw_proxied)s)rk   S.. container:: class_bases

    Proxied for the %s class on behalf of the %s class.r   )rI   r   ro   r+   rp   rr   r*   rs   rt   r   r-   classmethod)	rj   clslevelrb   rv   rw   Zcaller_argspecrz   r{   Zproxy_fnproxy_cls_sphinx_namer   target_cls_sphinx_namer   r   
instrument  sB   




z:create_proxy_methods.<locals>.decorate.<locals>.instrumentc                    sR   j | d }|d urt|jd f d}nd }dd| i }t|d|id}|S )Nr   r   zdef set_(self, attr):
    self._proxied.%(name)s = attr
def get(self):
    return self._proxied.%(name)s
get.__doc__ = doc
getset = property(get, set_)rj   r   getset)r   r   r   r-   rs   )rj   attrr   r{   r   r   r   r   makeprop  s"   	z8create_proxy_methods.<locals>.decorate.<locals>.makepropz class %s already has a method %sTr   r)   )rP   r   setattr)r4   r   r   methprop
attributesclassmethodsmethodsr   r   r   r   r   r~     s*   -





z&create_proxy_methods.<locals>.decorater   )r   r   r   r   r   r   r~   r   r   r   create_proxy_methodsv  s   cr   c                 C   sJ   zt | W S  ty$   | tju rdgdddf Y S dgdddf Y S w )zinspect.getargspec with considerations for typical __init__ methods

    Wraps inspect.getargspec with error handling for typical __init__ cases::

      object.__init__ -> (self)
      other unreflectable (usually C) -> (self, *args, **kwargs)

    r   Nr   kwargs)r   ro   r   r   r   )r   r   r   r   getargspec_init  s   	
r   c                 C   s   t | tjr| js| jS | S )zSAdjust the incoming callable such that a 'self' argument is not
    required.

    )r8   r   
MethodTyper   rk   )Zfunc_or_clsr   r   r   unbound_method_to_callable  s   r   c              	      s(  |du rg}nt |}t  g }t  }d}t|D ]k\}}zt|j}	W n	 ty1   Y qw |	j	r:t
|	j	p;d}
|dkr_|	jrF|	j}|
rT||	jd|
   n||	jdd  n| fdd|	jd|
  D  |
r|dd t|	j|
 d |	j	D  qg }|fdd|D  |durt|r|d	d t|D  | D ]+\}}||v rqzt| }| ur||kr|d
||f  W q ty   Y qw |r	|D ]'\}}zt| }| ur||kr|d
||f  W q ty   Y qw djjd|f S )z}Produce a __repr__() based on direct association of the __init__()
    specification vs. same-named attributes present.

    Nr   r   c                    s   g | ]}| fqS r   r   r@   r   )missingr   r   
<listcomp>'      z generic_repr.<locals>.<listcomp>c                 S   s   g | ]\}}||fqS r   r   )r@   r   defaultr   r   r   r   ,  s    c                 3   s     | ]}t t |d V  qd S r   )reprrI   r   objr   r   rB   5  s    zgeneric_repr.<locals>.<genexpr>c                 S   s   g | ]}t |qS r   r   )r@   valr   r   r   r   8  r   z%s=%rz%s(%s), )r   to_listr   OrderedDict	enumerater   ro   r   r   r   r   r   r2   r   r   ziprP   rI   itemsrQ   r;   rH   r*   rC   )r   Zadditional_kwZ
to_inspectZ
omit_kwargZpos_argsZkw_argsZvargsrU   Zinsprv   Zdefault_lenoutputr   Zdefvalr   r   )r   r   r   generic_repr  st   
r  c                   @   s6   e Zd ZdZdZdd Zdd Zddd	Zd
d ZdS )portable_instancemethodz_Turn an instancemethod into a (parent, name) pair
    to produce a serializable callable.

    )rg   rj   r   __weakref__c                 C   s   | j | j| jdS )Nrg   rj   r   r  r   r   r   r   __getstate__X  s   z$portable_instancemethod.__getstate__c                 C   s&   |d | _ |d | _|dd| _d S )Nrg   rj   r   r   )rg   rj   r   r   )r   stater   r   r   __setstate___  s   

z$portable_instancemethod.__setstate__r   c                 C   s   |j | _|j| _|| _d S r   )r   rg   r*   rj   r   )r   r   r   r   r   r   r   d  s   
z portable_instancemethod.__init__c                 O   s$   | | j t| j| j|i |S r   )r   r   rI   rg   rj   )r   r   kwr   r   r   r   i  s   z portable_instancemethod.__call__N)r   )	r*   r+   r,   r-   r.   r  r  r   r   r   r   r   r   r	  P  s    
r	  c                    s   t jrt| tjrt S | h t| j}|r|| }t jr/t|tjr$q fdd|jD }n
 fdd|jD }|D ]}|	|  
| q;t jrW|jdksUt|dsVqn|jdksat|dsbq fdd| D D ]}|	|  
| qm|st S )	a  Return an unordered sequence of all classes related to cls.

    Traverses diamond hierarchies.

    Fibs slightly: subclasses of builtin types are not returned.  Thus
    class_hierarchy(class A(object)) returns (A, object), not A plus every
    class systemwide that derives from object.

    Old-style classes are discarded and hierarchies rooted on them
    will not be descended.

    c                 3   s(    | ]}| vrt |tjs|V  qd S r   )r8   r   	ClassTyper@   _Zhierr   r   rB     s    

z"class_hierarchy.<locals>.<genexpr>c                 3   s    | ]	}| vr|V  qd S r   r   r  r  r   r   rB         r   r3   r   c                    s   g | ]}| vr|qS r   r   r  r  r   r   r     s    z#class_hierarchy.<locals>.<listcomp>)r   r   r8   r   r  r   __mro__r0   r   rQ   r1   r	   r+   rP   r3   )r4   processr   r^   rc   sr   r  r   class_hierarchyn  s<   



r  c                 c   sB    t | }|D ]}| jD ]}||jv r||j| fV   nqqdS )ziterate all the keys and attributes associated
    with a class, without using getattr().

    Does not use getattr() so that class-sensitive
    descriptors (i.e. property.__get__()) are not called.

    N)dirr  r   )r4   keyskeyr   r   r   r   iterate_attributes  s   

r  
self.proxyc              	      s$  |r|}ndu rd fddt |D }|D ]v}zt||}t|ds(W qt|d|}W n	 ty8   Y qw zt|}	t|	d }
t|	d dd }W n ty_   d	}
d
}Y nw dt  }|durm||ipni }t	|| z|j
|| _
W n	 ty   Y nw t |||  qdS )z9Automates delegation of __specials__ for a proxying type.N)r.   __del____getattribute____metaclass__r  r  c                    s6   g | ]}| d r|d rt |s|vr|qS )__)
startswithendswithrP   r@   r   into_clsskipr   r   r     s    z0monkeypatch_proxied_specials.<locals>.<listcomp>r   rk   r   r   z(self, *args, **kw)z(*args, **kw)z?def %(method)s%(fn_args)s: return %(name)s.%(method)s%(d_args)s)r  rI   rP   r   r   ro   r   r   localsexec_rt   r   )r&  Zfrom_clsr'  onlyrj   Zfrom_instanceZdundersr   rb   rv   Zfn_argsZd_argspyrw   r   r%  r   monkeypatch_proxied_specials  sJ   



r,  c                 C   s   t | d| t |d|u S )z;Return True if the two methods are the same implementation.rk   )rI   )Zmeth1Zmeth2r   r   r   methods_equivalent  s   r-  c                 C   sj  |s|st dt|trt| |r| S t|pdd t|D }tt| }tj}t|tr2|}n|s;t }tj}nt|}||||rI| S t| t	sc|tju rUdpVd}t d| |d
|f G dd	 d	t}|rsd
|j |_t }	t| D ](\}
}|
|vrt d|
 t|st d|
|f t||
t| |	|
 qz||	|r|S t dd
||	  )a  Ensure basic interface compliance for an instance or dict of callables.

    Checks that ``obj`` implements public methods of ``cls`` or has members
    listed in ``methods``. If ``required`` is not supplied, implementing at
    least one interface method is sufficient. Methods present on ``obj`` that
    are not in the interface are ignored.

    If ``obj`` is a dict and ``dict`` does not meet the interface
    requirements, the keys of the dictionary are inspected. Keys present in
    ``obj`` that are not in the interface will raise TypeErrors.

    Raises TypeError if ``obj`` does not meet the interface criteria.

    In all passing cases, an object with callable members is returned.  In the
    simple case, ``obj`` is returned as-is; if dict processing kicks in then
    an anonymous class is returned.

    obj
      A type, instance, or dictionary of callables.
    cls
      Optional, a type.  All public methods of cls are considered the
      interface.  An ``obj`` instance of cls will always pass, ignoring
      ``required``..
    methods
      Optional, a sequence of method names to consider as the interface.
    required
      Optional, a sequence of mandatory implementations. If omitted, an
      ``obj`` that provides at least one interface method is considered
      sufficient.  As a convenience, required may be a type, in which case
      all public methods of the type are required.

    z2a class or collection of method names are requiredc                 S   s   g | ]	}| d s|qS )r  )r"  r$  r   r   r   r     s    z as_interface.<locals>.<listcomp>zany ofzall ofz%r does not implement %s: %sr  c                   @   s   e Zd ZdZdS )z(as_interface.<locals>.AnonymousInterfacezA callable-holding shell.N)r*   r+   r,   r-   r   r   r   r   AnonymousInterface6  s    r.  Z	Anonymousz%r: unknown in this interfacez%r=%r is not callablez,dictionary does not contain required keys %s)r   r8   rG   r/   r  operatorgegtintersectionrq   rC   r   r*   dictlike_iteritemsr   r   r   staticmethodr1   )r   r4   r   requiredZ	interfaceZimplementedZcompliesZ	qualifierr.  foundr   r   r   r   r   as_interface  sP   !



r7  c                   @   s6   e Zd ZdZdddZdd Zdd Zed	d
 ZdS )memoized_propertyz2A read-only @property that is only evaluated once.Nc                 C      || _ |p|j| _|j| _d S r   fgetr-   r*   r   r;  r   r   r   r   r   Q     zmemoized_property.__init__c                 C   s&   |d u r| S |  | |j| j< }|S r   )r;  r   r*   r   r   r4   resultr   r   r   __get__V  s   zmemoized_property.__get__c                 C   s   t || j d S r   )r8  resetr*   )r   r   r   r   r   _reset\  s   zmemoized_property._resetc                 C   s   |j |d  d S r   )r   r0   )r4   r   rj   r   r   r   rA  _  s   zmemoized_property.resetr   )	r*   r+   r,   r-   r   r@  rB  r   rA  r   r   r   r   r8  N  s    
r8  c                    re   )zDecorate a method memoize its return value.

    Best applied to no-arg methods: memoization is not sensitive to
    argument values, and will always return the same value even when
    called with different arguments.

    c                    sB   | g|R i |  fdd}j |_ j|_|| jj <  S )Nc                         S r   r   ar  r?  r   r   memop     z6memoized_instancemethod.<locals>.oneshot.<locals>.memo)r*   r-   r   r   r   r  rG  rb   rF  r   oneshotm  s   z(memoized_instancemethod.<locals>.oneshotr   )rb   rK  r   rJ  r   memoized_instancemethodd  s   	
rL  c                   @   sN   e Zd ZdZdZe Zdd Zdd Zdd Z	G d	d
 d
e
Zedd ZdS )HasMemoizedzyA class that maintains the names of memoized elements in a
    collection for easy cache clearing, generative, etc.

    r   c                 C   s   | j D ]	}| j|d  qd S r   )_memoized_keysr   r0   r   r   r   r   r   _reset_memoizations     
zHasMemoized._reset_memoizationsc                 C   s   | j D ]	}|| jvsJ qd S r   )rN  r   rO  r   r   r   _assert_no_memoizations  rQ  z#HasMemoized._assert_no_memoizationsc                 C   s   || j |< |  j|hO  _d S r   )r   rN  )r   r  r#   r   r   r   _set_memoized_attribute  s   
z#HasMemoized._set_memoized_attributec                   @   s"   e Zd ZdZdddZdd ZdS )zHasMemoized.memoized_attributezTA read-only @property that is only evaluated once.

        :meta private:

        Nc                 C   r9  r   r:  r<  r   r   r   r     r=  z'HasMemoized.memoized_attribute.__init__c                 C   s8   |d u r| S |  | |j| j< }| j| jhO  _|S r   )r;  r   r*   rN  r>  r   r   r   r@    s
   z&HasMemoized.memoized_attribute.__get__r   )r*   r+   r,   r-   r   r@  r   r   r   r   memoized_attribute  s    
rT  c                        fdd}t | S )z+Decorate a method memoize its return value.c                    sT   | g|R i |  fdd}j |_ j|_|| jj < |  jj hO  _ S )Nc                     rC  r   r   rD  rF  r   r   rG    rH  zBHasMemoized.memoized_instancemethod.<locals>.oneshot.<locals>.memo)r*   r-   r   rN  rI  rJ  rF  r   rK    s   z4HasMemoized.memoized_instancemethod.<locals>.oneshotr   )r4   rb   rK  r   rJ  r   rL    s   
z#HasMemoized.memoized_instancemethodN)r*   r+   r,   r-   r.   	frozensetrN  rP  rR  rS  r   rT  r   rL  r   r   r   r   rM  {  s    rM  c                   @   s$   e Zd ZdZdZdd Zdd ZdS )MemoizedSlotszApply memoized items to an object using a __getattr__ scheme.

    This allows the functionality of memoized_property and
    memoized_instancemethod to be available to a class using __slots__.

    r   c                 C   s   t |r   )r   )r   r  r   r   r   _fallback_getattr     zMemoizedSlots._fallback_getattrc                    s    dr	ttd r td  }t| |S td r<td   fdd} j|_|S S )NZ	_memoizedz_memoized_attr_%sz_memoized_method_%sc                     s:   | i |  fdd}j |_ j|_t|  S )Nc                     rC  r   r   rD  rF  r   r   rG    rH  z8MemoizedSlots.__getattr__.<locals>.oneshot.<locals>.memo)r*   r-   r   )r   r  rG  rb   r  r   rF  r   rK    s   z*MemoizedSlots.__getattr__.<locals>.oneshot)r"  r   rP   rI   r   r-   rX  )r   r  r#   rK  r   rZ  r   __getattr__  s   

zMemoizedSlots.__getattr__N)r*   r+   r,   r-   r.   rX  r[  r   r   r   r   rW    s
    rW  c                 C   sD   t | tjr|   } | dv rdS | dv rdS td|  t| S )N)trueyesonyt1T)falsenooffrA   f0FzString is not true/false: %r)r8   r   r9   stripr?   
ValueErrorr   r   r   r   r   asbool  s   ri  c                     s    fdd}|S )zqReturn a callable that will evaluate a string as
    boolean, or one of a set of "alternate" string values.

    c                    s   |  v r| S t | S r   )ri  r   textr   r   bool_or_value  s   z"bool_or_str.<locals>.bool_or_valuer   )rk  rl  r   rj  r   bool_or_str  s   rm  c                 C   s   | du r| S t | S )zCoerce to integer.N)int)r#   r   r   r   asint  s   ro  c                 C   sx   |du r| }|| v r6t |trt | | |s:| | dur8|tu r,|r,t| | ||< dS || | ||< dS dS dS dS )zIf 'key' is present in dict 'kw', coerce its value to type 'type\_' if
    necessary.  If 'flexi_bool' is True, the string '0' is considered false
    when coercing to boolean.
    N)r8   rG   r   ri  )r  r  r"   Z
flexi_booldestr   r   r   coerce_kw_type  s   
rq  c                    s$   t |}|ft fdd|D  S )zbProduce a tuple structure that is cacheable using the __dict__ of
    obj to retrieve values

    c                 3   (    | ]}| j v r| j | fV  qd S r   r   r@   kr   r   r   rB         

z"constructor_key.<locals>.<genexpr>)r   rR   )r   r4   rx   r   r   r   constructor_key  s   
rw  c                    s4   t |}| fdd||D  ||i |S )zInstantiate cls using the __dict__ of obj as constructor arguments.

    Uses inspect to match the named arguments of ``cls``.

    c                 3   rr  r   rs  rt  r   r   r   rB   *  rv  z#constructor_copy.<locals>.<genexpr>)r   r   
difference)r   r4   r   r  rx   r   r   r   constructor_copy"  s
   ry  c                     s&   t j td  fdd} | S )z%Return a threadsafe counter function.r   c                      s0    t  W  d    S 1 sw   Y  d S r   )nextr   counterlockr   r   _next7  s   $zcounter.<locals>._next)r   	threadingLockrY   count)r~  r   r{  r   r|  0  s   

r|  c                 C   s   t | dr| jdurt| jtrtS | jS t| trtpt}|| tr%tS || tr,tS || tr3tS t | dr:tS t | drAtS t | drHtS |S )zGiven an instance or class, guess if it is or is acting as one of
    the basic collection types: list, set and dict.  If the __emulates__
    property is present, return that preferentially.
    __emulates__NrQ   r1   r/   )rP   r  
issubclassr/   r8   rG   r   rq   )Zspecimenr   Zisar   r   r   duck_type_collection>  s(   






r  c                 C   sX   t | |r| S t |tr td|ddd |D t| f td||t| f )Nz8Argument '%s' is expected to be one of type %s, got '%s'z or c                 s   s    | ]}d | V  qdS )z'%s'Nr   )r@   rE  r   r   r   rB   f  s    z"assert_arg_type.<locals>.<genexpr>z6Argument '%s' is expected to be of type '%s', got '%s')r8   rR   r   ArgumentErrorrC   rG   )r   Zargtyperj   r   r   r   assert_arg_type_  s   

r  c                    s   t jrt drt  S nt dr  S t dr#t  S t dt dddu r7td  t drF fdd	}| S t d
rXtfdd 	 D S td  )z?Return a (key, value) iterator for almost any dict-like object.r  	iteritems__getitem__r   NzObject '%r' is not dict-likeiterkeysc                  3   s"       D ]	} | | fV  qd S r   )r  )r  dictlikegetterr   r   iterator  s   z$dictlike_iteritems.<locals>.iteratorr  c                 3   s    | ]	}| |fV  qd S r   r   )r@   r  )r  r   r   rB     r  z%dictlike_iteritems.<locals>.<genexpr>)
r   r	   rP   r   r  r  iterrI   r   r  )r  r  r   r  r   r3  o  s"   




r3  c                       (   e Zd ZdZ fddZdd Z  ZS )classpropertyaA  A decorator that behaves like @property except that operates
    on classes rather than instances.

    The decorator is currently special when using the declarative
    module, but note that the
    :class:`~.sqlalchemy.ext.declarative.declared_attr`
    decorator should be used for this purpose with declarative.

    c                    s*   t t| j|g|R i | |j| _d S r   )superr  r   r-   )r   r;  r   r  rH   r   r   r     s   zclassproperty.__init__c                 C   s
   |  |S r   )r;  )descr   r4   r   r   r   r@    r   zclassproperty.__get__)r*   r+   r,   r-   r   r@  __classcell__r   r   r  r   r    s    
r  c                   @   s$   e Zd Zdd Zdd Zdd ZdS )hybridpropertyc                 C   s   || _ || _d S r   )r   r   r   r   r   r   r   r     s   
zhybridproperty.__init__c                 C   s    |d u r|  |}|S | |S r   )r   r   )r   instanceownerZclsvalr   r   r   r@    s   

zhybridproperty.__get__c                 C   
   || _ | S r   r   r  r   r   r   
classlevel     zhybridproperty.classlevelN)r*   r+   r,   r   r@  r  r   r   r   r   r    s    r  c                   @   s(   e Zd ZdZdd Zdd Zdd ZdS )	hybridmethodz/Decorate a function as cls- or instance- level.c                 C   s   | | _ | _|| _d S r   )r   rk   r   r  r   r   r   r     s   
zhybridmethod.__init__c                 C   s&   |d u r| j ||jS | j||S r   )r   r@  rH   r   )r   r  r  r   r   r   r@    s   zhybridmethod.__get__c                 C   r  r   r   r  r   r   r   r    r  zhybridmethod.classlevelN)r*   r+   r,   r-   r   r@  r  r   r   r   r   r    s
    r  c                   @   r   )_symbolNc                 C   s@   t |tjsJ |du rt|}tt|}||_|r||_|S )zConstruct a new named symbol.N)	r8   r   r9   hashrn  __new__r  rj   r-   )r   rj   r   	canonicalvr   r   r   r    s   z_symbol.__new__c                 C   s   t | jdt| ffS )Nr   )r   rj   rn  r   r   r   r   
__reduce__  s   z_symbol.__reduce__c                 C   s   t | S r   r   r   r   r   r   __str__  rY  z_symbol.__str__c                 C   s
   d| j  S )Nz
symbol(%r))rj   r   r   r   r   __repr__  r   z_symbol.__repr__NN)r*   r+   r,   r  r  r  r  r   r   r   r   r    s
    
r  r   c                   @   s8   e Zd ZdZi Zej ZdddZ	e
	d	ddZdS )
r   a  A constant symbol.

    >>> symbol('foo') is symbol('foo')
    True
    >>> symbol('foo')
    <symbol 'foo>

    A slight refinement of the MAGICCOOKIE=object() pattern.  The primary
    advantage of symbol() is its repr().  They are also singletons.

    Repeated calls of symbol('name') will all return the same instance.

    The optional ``doc`` argument assigns to ``__doc__``.  This
    is strictly so that Sphinx autoattr picks up the docstring we want
    (it doesn't appear to pick up the in-module docstring if the datamember
    is in a different module - autoattribute also blows up completely).
    If Sphinx fixes/improves this then we would no longer need
    ``doc`` here.

    Nc                 C   sX   | j  | j|}|d u rt||| | j|< }|W  d    S 1 s%w   Y  d S r   )_locksymbolsr   r  )r4   rj   r   r  r`   r   r   r   r    s   $zsymbol.__new__Fc                 C   sf   |  D ]\}}||u r|  S |r||jkr|  S ||v r#|  S q|du r*dS td||f )a  Given a user parameter, parse the parameter into a chosen symbol.

        The user argument can be a string name that matches the name of a
        symbol, or the symbol object itself, or any number of alternate choices
        such as True/False/ None etc.

        :param arg: the user argument.
        :param choices: dictionary of symbol object to list of possible
         entries.
        :param name: name of the argument.   Used in an :class:`.ArgumentError`
         that is raised if the parameter doesn't match any available argument.
        :param resolve_symbol_names: include the name of each symbol as a valid
         entry.

        NzInvalid value for '%s': %r)r  rj   r   r  )r4   r   choicesrj   Zresolve_symbol_namesr`   choicer   r   r   parse_user_argument  s   zsymbol.parse_user_argumentr  r)   )r*   r+   r,   r-   r  r   r  r  r  r  r   r  r   r   r   r   r     s    

c                 C   s   t | _ t d7 a dS )zAssign a '_creation_order' sequence to the given instance.

    This allows multiple instances to be sorted in order of creation
    (typically within a single thread; the counter is not particularly
    threadsafe).

    r   N)_creation_order)r  r   r   r   set_creation_order"  s   	r  c                 O   s>   z| |i |W S  t y   tdt dd   Y dS w )zXexecutes the given function, catches all exceptions and converts to
    a warning.

    z%s('%s') ignoredr   r   N)r;   r!   r   r   )r   r   r   r   r   r   warn_exception/  s
   r     c                 C   s<   zt | |krd| d|  W S | W S  ty   |  Y S w )Nz%s...r   )r   r   )r#   Zlen_r   r   r   ellipses_string:  s   r  c                       s0   e Zd ZdZ fddZdd Zdd Z  ZS )_hash_limit_stringa/  A string subclass that can only be hashed on a maximum amount
    of unique values.

    This is used for warnings so that we can send out parameterized warnings
    without the __warningregistry__ of the module,  or the non-overridable
    "once" registry within warnings.py, overloading memory,


    c                    s@   || d|  }t t| | |}td|t|| f |_|S )Nz6 (this warning may be suppressed after %d occurrences)z%s_%d)r  r  r  r  _hash)r4   r#   numr   Zinterpolatedr   r  r   r   r  O  s   z_hash_limit_string.__new__c                 C   s   | j S r   )r  r   r   r   r   __hash__W  s   z_hash_limit_string.__hash__c                 C   s   t | t |kS r   )r  )r   otherr   r   r   __eq__Z  s   z_hash_limit_string.__eq__)r*   r+   r,   r-   r  r  r  r  r   r   r  r   r  D  s
    
r  c                 C   s*   |rt tj| |d dS t | tj dS )zdIssue a warning.

    If msg is a string, :class:`.exc.SAWarning` is used as
    the category.

    )r{   N)_warnings_warnr   	SAWarning)msgr{   r   r   r   r!   ^  s   r!   c                 C   s    |rt | d|} t| tj dS )z\Issue a warning with a parameterized string, limiting the number
    of registrations.

    
   N)r  r  r   r  )r  r   r   r   r   warn_limitedk  s   r  c                 C   s   zt |}W n ty   d}Y n,   d}Y n%|d ur>td|jddr>|j}|d7 }|d ur>td|jdds(|d urNtj	| ||d d d S tj	| |d d d S )Nr   z^(?:sqlalchemy\.|alembic\.)r*   r   r   )
stacklevel)
r   	_getframerh  rD   match	f_globalsr   f_backwarningsr!   )messagecategoryr  framer   r   r   r  u  s"   r  c                    s    g fdd}|S )zNDecorate the given function to be a no-op after it is called exactly
    once.c                     s>    }r  }z|| i |W S    rd|  d S )Nr   )r0   insert)r   r  Z	strong_fnZonce_fnrb   onceretry_on_exceptionr   r   go  s   zonly_once.<locals>.gor   )rb   r  r  r   r  r   	only_once  s   r  z%sqlalchemy/([a-z_]+/){0,2}[a-z_]+\.pyzunit(?:2|test2?/)c                 C   s   d}t | d }||kr"|| | r"|d7 }||kr"|| | s||kr<|| | r<|d8 }||kr<|| | s-| ||d  S )at  Chop extraneous lines off beginning and end of a traceback.

    :param tb:
      a list of traceback lines as returned by ``traceback.format_stack()``

    :param exclude_prefix:
      a regular expression object matching lines to skip at beginning of
      ``tb``

    :param exclude_suffix:
      a regular expression object matching lines to skip at end of ``tb``
    r   r   )r   search)tbZexclude_prefixZexclude_suffixrM   endr   r   r   chop_traceback  s   r  c                 C   s$   d|  }t   }t|| |d S )Nz&def set(obj, value):    obj.%s = valuer/   )r(  copyr   )attrnamer{   rw   r   r   r   
attrsetter  s   

r  c                       r  )EnsureKWArgTypezYApply translation of functions to accept \**kw arguments if they
    don't already.

    c           
         sr   | j }|r-|D ]%}t||}|r,|| }t|}|js,| | ||< }	t| ||	 qtt	| 
||| d S r   )Zensure_kwargrD   r  r   ro   r   
_wrap_w_kwr   r  r  r   )
r4   clsnamer^   ZclsdictZfn_regr  r   rb   rv   wrappedr  r   r   r     s   
zEnsureKWArgType.__init__c                    rU  )Nc                     s    |  S r   r   )r   r  rJ  r   r   wrap  rY  z(EnsureKWArgType._wrap_w_kw.<locals>.wrapr   )r   rb   r  r   rJ  r   r    s   
zEnsureKWArgType._wrap_w_kw)r*   r+   r,   r-   r   r  r  r   r   r  r   r    s    r  c                 C   sh   t |dr
t| |S | }|jj|_t |dr|j|_t |jdr+|jjr+|jj|_|S |jr2|j|_|S )zAugment functools.update_wrapper() to work with objects with
    a ``__call__()`` method.

    :param fn:
      object with __call__ method

    r*   r+   r-   )rP   r   rH   r*   r+   r   r-   )wrapperrb   Z_fr   r   r   wrap_callable  s   




r  c                 C   s   d| vr	|  dS d}g g}d}t| }||k r`| | }|dkrC|dkr>||d k r>| |d  dkr>|d d |d7 }n|dN }n|dkrQ|dkrQ|g  n|d | |d7 }||k sdd |D S )a  Parse a dotted identifier with accommodation for quoted names.

    Includes support for SQL-style double quotes as a literal character.

    E.g.::

        >>> quoted_token_parser("name")
        ["name"]
        >>> quoted_token_parser("schema.name")
        ["schema", "name"]
        >>> quoted_token_parser('"Schema"."Name"')
        ['Schema', 'Name']
        >>> quoted_token_parser('"Schema"."Name""Foo"')
        ['Schema', 'Name""Foo']

    "r   r   r   r   c                 S   s   g | ]}d  |qS )r   )rC   )r@   r   r   r   r   r   '  s    z'quoted_token_parser.<locals>.<listcomp>)r   r   rQ   )r#   r  r?  idxlvcharr   r   r   quoted_token_parser  s&   
$

r  c                    s   t    fdd}|S )Nc                    s:   | j d ur| j p	d}|rt|fdd D }|| _ | S )Nr   c                    s   i | ]}| qS r   r   )r@   paramrj  r   r   
<dictcomp>0  s    z8add_parameter_text.<locals>.decorate.<locals>.<dictcomp>)r-   inject_param_text)rb   r   paramsrk  r   r   r~   -  s
   z$add_parameter_text.<locals>.decorate)r   r  )r  rk  r~   r   r  r   add_parameter_text*  s   
r  c                 C   sJ   |  dd}t|dkr| S |\}}|ds |d t| S t| S )N
r   r>   )r   r   r"  textwrapdedent)rk  Z
split_text	firstline	remainingr   r   r   _dedent_docstring7  s   

r  c                 C   s   t | pd} | d}t|dkr|d t|d}|d r(|dd dd t|D }|dd |t|t|d  }|d| | ||d   }d	|S )Nr   r  r   r   c                 S   s   g | ]
\}}|  s|qS r   )rg  )r@   r  liner   r   r   r   L  s    z)inject_docstring_text.<locals>.<listcomp>)
r  r   r   rQ   r  r  r  r  minrC   )doctextZ
injecttextposlinesZinjectlinesZblanksZ
inject_posr   r   r   r   C  s   


r   z(\s+):param (.+?):c           
      C   s  t |  }g }d }|r| }t|}|d u rO|rN|dd}||v rNdt|d d }|rHt	d|d }	|	rHdt|	d }|||  }n+|r\|
d|dg d }n| sk|
||dg d }n|drz|
|| g q|| |sd|S )	Nr   *r>   r   z(\s+)\Sr   r  z::)collectionsdeque
splitlinespopleft
_param_regr  r   lstripr   rD   r2   rstripr#  rQ   rC   )
r  Zinject_paramsZdoclinesr  Z	to_injectr  r   r  indentm2r   r   r   r  X  s:   



!r  c                 C   s~   t | dkrdS t | dk}|r| dd n| dd | dd  } dd | D }|r0d|S d	d|dd |d f S )
zTrims a list of strings from the middle and return a string of up to
    four elements. Strings greater than 11 characters will be truncatedr   Nr   rf   r   c                 S   s,   g | ]}t |d krd|dd   n|qS )   z%s..N)r   )r@   rj   r   r   r   r     s   , z$repr_tuple_names.<locals>.<listcomp>r  z%s, ..., %s)r   rC   )rx   flagresr   r   r   repr_tuple_names  s   (
r  c                  C   s@   zddl m}  ddl m} ddl m} W dS  ty   Y dS w )Nr   )cimmutabledict)cprocessors)cresultproxyTF)r   r  r  r  r   )r  r  r  r   r   r   has_compiled_ext  s   r  r   )FF)T)r   r   r   )r   Nr   )NNr  N)NNN)TN)r  )Nr   )ar-   r  	functoolsr   r   rl   rY   r/  rD   r   r  r   r  r   r   r   r   r   r   r   r7   r=   rF   rK   rT   ra   rd   r   rp   rs   r   r   r   r   r   r   rr   r   r   r   r   r  r	  r  r  r,  r-  r7  r8  rL  rM  rW  ri  rm  ro  rq  rw  ry  r|  r  r  r3  propertyr  r  r  rn  r  r*   r   r  r  r  r  	text_typer  r!   r  r  r  compileZ_SQLA_REZ_UNITTEST_REr  rG   NoneTyper  r  r  r  r  r  r   r  r  r  r  r   r   r   r   <module>   s   1
	#
W&
+

6
p%
t
H3
?
V<)

!D






,
+