AttributeError : six missing "indexbytes" when compiling protobuf with a custom python plugin

Question

我在使用自定义 python 插件编译 protobuf 文件时遇到问题。在一台机器上它是预期的运行而在另一台机器上这会导致以下错误：

 Traceback (most recent call last):
      File "C:\...\my_plugin.py", line 14, in <module>
        from google.protobuf.compiler import plugin_pb2 as plugin
      File "C:\Python27\lib\site-packages\google\protobuf\compiler\plugin_pb2.py", line 255, in <module>
        DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n4com.google.protobuf.compilerB4PluginProtosZ\tplugin_go'))
      File "C:\Python27\lib\site-packages\google\protobuf\descriptor.py", line 869, in _ParseOptions
        message.ParseFromString(string)
      File "C:\Python27\lib\site-packages\google\protobuf\message.py", line 185, in ParseFromString
        self.MergeFromString(serialized)
      File "C:\Python27\lib\site-packages\google\protobuf\internal\python_message.py", line 1062, in MergeFromString
        if self._InternalParse(serialized, 0, length) != length:
      File "C:\Python27\lib\site-packages\google\protobuf\internal\python_message.py", line 1084, in InternalParse
        (tag_bytes, new_pos) = local_ReadTag(buffer, pos)
      File "C:\Python27\lib\site-packages\google\protobuf\internal\decoder.py", line 181, in ReadTag
        while six.indexbytes(buffer, pos) & 0x80:
    AttributeError: 'module' object has no attribute 'indexbytes'
    --my_plugin_out: protoc-gen-my_plugin: Plugin failed with status code

两台机器有相同的Python版本：2.7.12.

我还确保它们具有相同的 Protobuf 模块版本 (3.2.0) 和六模块版本 (1.10.0)。

所以我不明白为什么 "six" 模块会错过上面调用堆栈中提到的 "decoder.py" 中所需的 "indexbytes" 方法。

Answer 1

我找不到根本原因，但似乎 Python 模块之间存在一些冲突，因为使用 virtualenv 解决了我的问题。参见 https://virtualenv.pypa.io/en/stable/userguide/

AttributeError : six missing "indexbytes" when compiling protobuf with a custom python plugin

AttributeError : six missing "indexbytes" when compiling protobuf with a custom python plugin

python

protocol-buffers

python-2.7

six

protoc