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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 get_file(self, commit, path, offset_bytes=0, size_bytes=0, extract_value=True):
 """ Returns an iterator of the contents contents of a file at a specific Commit. Params: * commit: A tuple, string, or Commit object representing the commit. * path: The path of the file. * offset_bytes: Optional. specifies a number of bytes that should be skipped in the beginning of the file. * size_bytes: Optional. limits the total amount of data returned, note you will get fewer bytes than size if you pass a value larger than the size of the file. If size is set to 0 then all of the data will be returned. * extract_value: If True, then an ExtractValueIterator will be return, which will iterate over the bytes of the file. If False, then the protobuf response iterator will return. """

        req = proto.GetFileRequest(
            file=proto.File(commit=commit_from(commit), path=path),
            offset_bytes=offset_bytes,
            size_bytes=size_bytes
        )
        res = self.stub.GetFile(req, metadata=self.metadata)
        if extract_value:
            return ExtractValueIterator(res)
        return res