问题
I am using protocol buffers in python and I have a Person message
repeated uint64 id
but when I try to assign a value to it like:
person.id = [1, 32, 43432]
I get an error: Assigment not allowed for repeated field "id" in protocol message object
How to assign a value to a repeated field ?
回答1:
As per the documentation, you aren't able to directly assign to a repeated field. In this case, you can call extend to add all of the elements in the list to the field.
person.id.extend([1, 32, 43432])
回答2:
If you don't want to extend but overwrite it completely, you can do:
person.id[:] = [1, 32, 43432]
This approach will also work to clear the field entirely:
del person.id[:]
回答3:
You can try using MergeFrom
Check out these docs for the full list of Message methods available to you: https://developers.google.com/protocol-buffers/docs/reference/python/google.protobuf.message.Message-class
来源：https://stackoverflow.com/questions/23726335/how-to-assign-to-repeated-field