File: //opt/alt/python38/lib/python3.8/site-packages/blinker/__pycache__/_utilities.cpython-38.pyc
U
� �Qi � @ s. d dl mZ d dlmZ ze W n ek
r< dd� ZY nX zd dlmZ W n G dd� de�ZY nX zd dl m
Z
W n e k
r� d d
� Z
Y nX G d d � d e �Z
d
e
_G dd
� d
e �Zz eefZW n ek
r� eZY nX dd� ZeefZG dd� de�Zddd�Zddd�ZG dd� de �ZdS ) � )�ref)�BoundMethodWeakrefc C s
t | d�S )N�__call__)�hasattr)�object� r �C/opt/alt/python38/lib/python3.8/site-packages/blinker/_utilities.py�callable s r )� defaultdictc @ sN e Zd Zddd�Zdd� Zdd� Zdd � Zd
d � Zd d
� Zdd� Z dd� Z
dS )r
Nc O s6 |d k rt |d�std��tj| f|�|� || _d S )Nr z first argument must be callable)r � TypeError�dict�__init__�default_factory)�selfr �a�kwr r r r
s �zdefaultdict.__init__c C s2 zt �| |�W S tk
r, | �|� Y S X d S �N)r � __getitem__�KeyError� __missing__)r �keyr r r r s zdefaultdict.__getitem__c C s& | j d krt|��| � � | |< }|S r )r r )r r �valuer r r r s
zdefaultdict.__missing__c C s0 | j d krt� }n| j f}t| �|d d | �� fS r )r �tuple�type�items)r �argsr r r �
__reduce__% s
zdefaultdict.__reduce__c C s | � � S r )�__copy__�r r r r �copy, s zdefaultdict.copyc C s t | �| j| �S r )r r r r r r r / s zdefaultdict.__copy__c C s" dd l }t| �| j|�| �� ��S )Nr )r r r �deepcopyr )r �memor r r r � __deepcopy__2 s
�zdefaultdict.__deepcopy__c C s d| j t�| �f S )Nzdefaultdict(%s, %s))r r �__repr__r r r r r# 7 s �zdefaultdict.__repr__)N) �__name__�
__module__� __qualname__r
r r r r r r" r# r r r r r
s
r
)�contextmanagerc C s dd� }| j |_ |S )Nc _ s t d��d S )Nz8Python 2.5 or above is required to use context managers.)� RuntimeError)r r r r r �oops@ s z contextmanager.<locals>.oops)r$ )�fnr) r r r r' ? s r' c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�_symbolc C s | | _ | _dS )z Construct a new named symbol.N)r$ �name)r r, r r r r
H s z_symbol.__init__c C s t | jffS r )�symbolr, r r r r r L s z_symbol.__reduce__c C s | j S r )r, r r r r r# O s z_symbol.__repr__N)r$ r% r& r
r r# r r r r r+ F s r+ r- c @ s e Zd ZdZi Zdd� ZdS )r- a? A constant symbol.
>>> symbol('foo') is symbol('foo')
True
>>> symbol('foo')
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.
c C s8 z | j | W S tk
r2 | j �|t|�� Y S X d S r )�symbolsr �
setdefaultr+ )�clsr, r r r �__new__d s zsymbol.__new__N)r$ r% r& �__doc__r. r1 r r r r r- T s
c C sV t | d�r t| j�t| j�fS t | d�r<t| j�t| j�fS t| t�rJ| S t| �S d S )N�__func__�im_func)r �idr3 �__self__r4 �im_self�
isinstance�text)�objr r r �hashable_identityq s
r; c @ s e Zd ZdZdS )�annotatable_weakrefz7A weakref.ref that supports custom instance attributes.N)r$ r% r& r2 r r r r r< s r< Nc K s@ t | �rt| |�}n
t| |�}|�� D ]\}}t|||� q&|S )z Return an annotated weak ref.)r �callable_referencer< r �setattr)r �callback� annotations�weakr r r r r � reference� s
rB c C sJ t | d�r | jdk r t| |d�S t | d�r@| jdk r@t| |d�S t| |�S )z@Return an annotated weak ref, supporting bound instance methods.r7 N)�target� on_deleter6 )r r7 r r6 r< )r r? r r r r= � s
r= c @ s e Zd ZdZdd� Zdd� ZdS )�
lazy_propertyz(A @property that is only evaluated once.c C s || _ |j| _d S r )� _deferredr2 )r �deferredr r r r
� s zlazy_property.__init__c C s* |d kr | S | � |�}t|| j j|� |S r )rF r> r$ )r r: r0 r r r r �__get__� s
zlazy_property.__get__N)r$ r% r& r2 r
rH r r r r rE � s rE )N)N)�weakrefr �blinker._saferefr r � NameError� collectionsr
r �
contextlibr' � ImportErrorr r+ r$ r- �str�unicoder9 r; � WeakTypesr< rB r= rE r r r r �<module> s4 ,