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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 copy(self, src, chunk_size=None, progress_callback=None):
 """Copy data from another file instance. :param src: Source stream. :param chunk_size: Chunk size to read from source stream. """

        fp = src.open(mode='rb')
        try:
            return self.save(
                fp, chunk_size=chunk_size, progress_callback=progress_callback)
        finally:
            fp.close()