Python 如何分配给重复字段？
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How to assign to repeated field?
提问by PaolaJ.
I am using protocol buffers in python and I have a Personmessage
我在 python 中使用协议缓冲区，我有一条Person消息
repeated uint64 id
but when I try to assign a value to it like:
但是当我尝试为它分配一个值时：
person.id = [1, 32, 43432]
I get an error: Assigment not allowed for repeated field "id" in protocol message objectHow to assign a value to a repeated field ?
我收到一个错误：Assigment not allowed for repeated field "id" in protocol message object如何为重复字段赋值？
采纳答案by Tim
As per the documentation, you aren't able to directly assign to a repeated field. In this case, you can call extendto add all of the elements in the list to the field.
根据文档，您无法直接分配给重复字段。在这种情况下，您可以调用extend将列表中的所有元素添加到字段中。
person.id.extend([1, 32, 43432])
回答by kirpit
If you don't want to extendbut overwrite it completely, you can do:
如果你不想扩展而是完全覆盖它，你可以这样做：
person.id[:] = [1, 32, 43432]
This approach will also work to clear the field entirely:
这种方法也将有助于彻底清除该领域：
del person.id[:]
回答by Nicholas Gentile
You can try using MergeFrom
您可以尝试使用 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
查看这些文档以获取可用的 Message 方法的完整列表：https: //developers.google.com/protocol-buffers/docs/reference/python/google.protobuf.message.Message-class
回答by Chandler
For repeated composite types this is what worked for me.
对于重复的复合类型，这对我有用。
del person.things[:]
person.things.extend([thing1, thing2, ..])
taken from these comments How to assign to repeated field?How to assign to repeated field?
取自这些评论 如何分配给重复的字段？如何分配给重复字段？
