def __getitem__(self, key):
        for sha, name in self.sha_names:
            if name == key:
                return sha
        raise KeyError("no item with name '%s'" % key)
Return SHA1 of sha_name tuple with name that matches *key*.
dataset/ETHPy150Open python-openxml/opc-diag/features/steps/step_data.py/_Manifest.__getitem__