Mar 7, 2025 · Jan 19, 2025 · Jan 19, 2025 · Jan 19, 2025 · Jan 19, 2025 · Jan 21, 2025
diff --git a/Lib/_pyio.py b/Lib/_pyio.py
    def read(self, size=None):
        """Read at most size bytes, returned as bytes.

        Only makes one system call, so less data may be returned than requested
        If size is less than 0, read all bytes in the file making
        multiple read calls. See ``_io.FileIO.readall``.

        Attempts to make only one system call, retrying only per
        PEP-475 (EINTR). This means less data may be returned than
        requested.

        In non-blocking mode, returns None if no data is available.
        Return an empty bytes object at EOF.
        """
    def readall(self):
        """Read all data from the file, returned as bytes.

        In non-blocking mode, returns as much as is immediately available,
        or None if no data is available.  Return an empty bytes object at EOF.
        Reads until either there is an error or read() returns size 0
        (indicates EOF). If the file is already at EOF, returns an
        empty bytes object.

        In non-blocking mode, returns as much data as could be read
        before EAGAIN. If no data is available (EAGAIN is returned
        before bytes are read) returns None.
        """
        self._checkClosed()
        self._checkReadable()
Original file line number	Diff line number	Diff line change
Expand Up		@@ -1636,7 +1636,13 @@ def _checkWritable(self, msg=None):
		def read(self, size=None):
		"""Read at most size bytes, returned as bytes.

		Only makes one system call, so less data may be returned than requested
		If size is less than 0, read all bytes in the file making
		multiple read calls. See ``_io.FileIO.readall``.

		Attempts to make only one system call, retrying only per
		PEP-475 (EINTR). This means less data may be returned than
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		requested.

		In non-blocking mode, returns None if no data is available.
		Return an empty bytes object at EOF.
		"""
Expand All		@@ -1652,8 +1658,13 @@ def read(self, size=None):
		def readall(self):
		"""Read all data from the file, returned as bytes.

		In non-blocking mode, returns as much as is immediately available,
		or None if no data is available. Return an empty bytes object at EOF.
		Reads until either there is an error or read() returns size 0
		(indicates EOF). If the file is already at EOF, returns an
		empty bytes object.

		In non-blocking mode, returns as much data as could be read
		before EAGAIN. If no data is available (EAGAIN is returned
		before bytes are read) returns None.
		"""
		self._checkClosed()
		self._checkReadable()
Expand Down