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�rPt||�}n t d#| ��|}|�rl|W S t|||||�}|}||_|W S |�� � Y nX dS )$a� Open file and return a stream. Raise OSError upon failure.
file is either a text or byte string giving the name (and the path
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wrapped. (If a file descriptor is given, it is closed when the
returned I/O object is closed, unless closefd is set to False.)
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opened. It defaults to 'r' which means open for reading in text mode. Other
common values are 'w' for writing (truncating the file if it already
exists), 'x' for exclusive creation of a new file, and 'a' for appending
(which on some Unix systems, means that all writes append to the end of the
file regardless of the current seek position). In text mode, if encoding is
not specified the encoding used is platform dependent. (For reading and
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available modes are:
========= ===============================================================
Character Meaning
--------- ---------------------------------------------------------------
'r' open for reading (default)
'w' open for writing, truncating the file first
'x' create a new file and open it for writing
'a' open for writing, appending to the end of the file if it exists
'b' binary mode
't' text mode (default)
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'U' universal newline mode (deprecated)
========= ===============================================================
The default mode is 'rt' (open for reading text). For binary random
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raises an `FileExistsError` if the file already exists.
Python distinguishes between files opened in binary and text modes,
even when the underlying operating system doesn't. Files opened in
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bytes objects without any decoding. In text mode (the default, or when
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returned as strings, the bytes having been first decoded using a
platform-dependent encoding or using the specified encoding if given.
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file. This should only be used in text mode. The default encoding is
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See the documentation for codecs.register for a list of the permitted
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enabled. Lines in the input can end in '\n', '\r', or '\r\n', and
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string, and the line ending is returned to the caller untranslated.
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The newly created file is non-inheritable.
A custom opener can be used by passing a callable as *opener*. The
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*opener* with (*file*, *flags*). *opener* must return an open file
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passing None).
open() returns a file object whose type depends on the mode, and
through which the standard file operations such as reading and writing
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'r', 'wt', 'rt', etc.), it returns a TextIOWrapper. When used to open
a file in a binary mode, the returned class varies: in read binary
mode, it returns a BufferedReader; in write binary and append binary
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stream.
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z_BufferedIOMixin.tellNc C s$ | � � |d kr| �� }| j�|�S rQ )rf ra r= rb rc rA rA rB rb $ s z_BufferedIOMixin.truncatec C s | j rtd��| j�� d S )N�flush on closed file)rh r# r= rf r` rA rA rB rf 2 s z_BufferedIOMixin.flushc C s. | j d k r*| js*z | �� W 5 | j �� X d S rQ )r= rh r5 rf r` rA rA rB r5 7 s z_BufferedIOMixin.closec C s* | j d krtd��| �� | j}d | _|S )Nzraw stream already detached)r= r# rf r� r� rA rA rB r� ? s
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zFileIO.readintoc C s< | � � | �� zt�| j|�W S tk
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N)re rr r r� r� r� r� rA rA rB r� � s z FileIO.writec C s* t |t�rtd��| �� t�| j||�S )a� Move to new file position.
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r c C s | � d� dS )z�Read at most size characters from stream, where size is an int.
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NrA r` rA rA rB �newlinesE s zTextIOBase.newlinesc C s dS )zMError setting of the decoder or encoder.
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