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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def open(self, mode='r', buffering=-1, encoding=None, errors=None, newline=None):
 """Open the file pointed by this path and return a fake file object. Raises: IOError: if the target object is a directory, the path is invalid or permission is denied. """

        if self._closed:
            self._raise_closed()
        return FakeFileOpen(self.filesystem, use_io=True)(
            self._path(), mode, buffering, encoding, errors, newline)