问题
I want to get all the field names of a proto into a list. Is there a way to do this? I looked in the documentation and there doesn't seem to be anything for this.
回答1:
Every proto class possess a DESCRIPTOR class variable that can be used to inspect the fields of corresponding protobuf messages.
Have a look at the documentation of the Descriptor and FieldDescriptor classes for more details.
Here is a simple example to get the FieldDescriptors of all the fields in message into a list:
res = message.DESCRIPTOR.fields
To get the names of the fields "exactly as they appear in the .proto file":
res = [field.name for field in message.DESCRIPTOR.fields]
or (from the comments):
res = message.DESCRIPTOR.fields_by_name.keys()
To get the full names of the fields "including containing scope":
res = [field.full_name for field in message.DESCRIPTOR.fields]
回答2:
qfiard's answer didn't work for me. Calling message.DESCRIPTOR.fields.keys() produced AttributeError: 'list' object has no attribute 'keys'.
Not sure why it wouldn't work. Maybe it has something to do with how the message was defined/compiled.
The workaround was to do a list composition of the individual field objects and get the name property for each. This gave me a list of strings of all fields in this list.
res = [f.name for f in message.DESCRIPTOR.fields]
Note that this does not get you the field names within those fields recursively.
来源：https://stackoverflow.com/questions/24639562/getting-all-field-names-from-a-protocol-buffer