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Pf	                 @   s    d dl mZ G dd deZdS )    )BytesIOc               @   sB   e Zd ZdZdd Zdd Zdd Zdd	 ZdddZdd Z	d
S )CallbackFileWrapperav  
    Small wrapper around a fp object which will tee everything read into a
    buffer, and when that file is closed it will execute a callback with the
    contents of that buffer.

    All attributes are proxied to the underlying file object.

    This class uses members with a double underscore (__) leading prefix so as
    not to accidentally shadow an attribute.
    c             C   s   t  | _|| _|| _d S )N)r   _CallbackFileWrapper__buf_CallbackFileWrapper__fp_CallbackFileWrapper__callback)selffpcallback r
   !/usr/lib/python3.6/filewrapper.py__init__   s    zCallbackFileWrapper.__init__c             C   s   | j d}t||S )Nr   )__getattribute__getattr)r   namer   r
   r
   r   __getattr__   s    	
zCallbackFileWrapper.__getattr__c             C   sD   y| j jd kS  tk
r    Y nX y| j jS  tk
r>   Y nX dS )NF)r   r   AttributeErrorclosed)r   r
   r
   r   Z__is_fp_closed!   s    z"CallbackFileWrapper.__is_fp_closedc             C   s    | j r| j | jj  d | _ d S )N)r   r   getvalue)r   r
   r
   r   _close0   s    zCallbackFileWrapper._closeNc             C   s,   | j j|}| jj| | j r(| j  |S )N)r   readr   write"_CallbackFileWrapper__is_fp_closedr   )r   amtdatar
   r
   r   r   ;   s
    zCallbackFileWrapper.readc             C   s@   | j j|}|dkr |dkr |S | jj| | j r<| j  |S )N   s   
)r   
_safe_readr   r   r   r   )r   r   r   r
   r
   r   r   C   s    zCallbackFileWrapper._safe_read)N)
__name__
__module____qualname____doc__r   r   r   r   r   r   r
   r
   r
   r   r      s   

r   N)ior   objectr   r
   r
   r
   r   <module>   s   