def __copy__(self):
"""
Forbid :class:`~iris._data_manager.DataManager` instance
shallow-copy support.
"""
name = type(self).__name__
emsg = ('Shallow-copy of {!r} is not permitted. Use '
'copy.deepcopy() or {}.copy() instead.')
raise copy.Error(emsg.format(name, name))
def __deepcopy__(self, memo):
raise copy.Error("Copying json_steam objects leads to a bad time")
def __copy__(self):
raise copy.Error("Copying json_steam objects leads to a bad time")