Method read

Lib/_pyio.py:923–944

(self, size=-1)

        super().close()

    def read(self, size=-1):
        if self.closed:
            raise ValueError("read from closed file")
        if size is None:
            size = -1
        else:
            try:
                size_index = size.__index__
            except AttributeError:
                raise TypeError(f"{size!r} is not an integer")
            else:
                size = size_index()

        with self._lock:
            if size < 0:
                size = len(self._buffer)
            if len(self._buffer) <= self._pos:
                return b""
            newpos = min(len(self._buffer), self._pos + size)
            b = self._buffer[self._pos : newpos]
            self._pos = newpos
            return bytes(b)

    def read1(self, size=-1):
        """This is the same as read.