Method _checkWritable

Lib/_pyio.py:455–460

Internal: raise UnsupportedOperation if file is not writable

(self, msg=None)

        return False

    def _checkWritable(self, msg=None):
        """Internal: raise UnsupportedOperation if file is not writable
        """
        if not self.writable():
            raise UnsupportedOperation("File or stream is not writable."
                                       if msg is None else msg)

    @property
    def closed(self):