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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 add_fileobj(self, fileobj, path, compress, flags=None):
 """Add the contents of a file object to the MAR file. Args: fileobj (file-like object):
 open file object path (str):
 name of this file in the MAR file compress (str):
 One of 'xz', 'bz2', or None. Defaults to None. flags (int):
 permission of this file in the MAR file. Defaults to the permissions of `path` """

        f = file_iter(fileobj)
        flags = flags or os.stat(path) & 0o777
        return self.add_stream(f, path, compress, flags)