def CopyFrom(self, other_msg):
    if self is other_msg:
      return
    self.Clear()
    self.MergeFrom(other_msg)
Reopening a file with extendable arrays using enumerated data.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/net/proto2/python/public/message.py/Message.CopyFrom--crossover with--dataset/ETHPy150Open PyTables/PyTables/tables/tests/test_enum.py/EnumEArrayTestCase.test00a_reopen