Can you check the protobuf runtime version? It seems you are using a proto3
protocol compiler but the python protobuf runtime is still an old version.

On Fri, Apr 1, 2016 at 6:19 AM, Ranadheer Pulluru <pranadh...@gmail.com>
wrote:

> Loading a generated python class is throwing below error -
>
> syntax = "proto3";
>
> message Foo {
>   string bar = 1;
> }
>
> > protoc --python_out=/u/pullurur/projects/samples/lib/python  simple.proto
>
> In [1]: from simple_pb2 import Foo
> ---------------------------------------------------------------------------
> TypeError                                 Traceback (most recent call last)
> <ipython-input-1-884a1959e005> in <module>()
> ----> 1 from simple_pb2 import Foo
>
> /u/pullurur/projects/samples/lib/python/simple_pb2.py in <module>()
>      20   package='',
>      21   syntax='proto3',
> ---> 22
> serialized_pb=_b('\n\x0csimple.proto\"\x12\n\x03\x46oo\x12\x0b\n\x03\x62\x61r\x18\x01
> \x01(\tb\x06proto3')
>      23 )
>      24 _sym_db.RegisterFileDescriptor(DESCRIPTOR)
>
> TypeError: __init__() got an unexpected keyword argument 'syntax'
>
>
>
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