AttributeError: partially initialized module 'graphene' has no attribute 'ObjectType' (most likely due to a circular import)

从 issue 中的 traceback 和最小 Python 示例开始，注意本地 v4/graphql.py 入口点以及 graphene 的导入链。检查所报告的行为是否能在指定的 Python 3.9.7 环境中复现；完成的标准是确定这是 Graphene 的 bug，还是示例模块布局特有的问题。

Note: for support questions, please use stackoverflow. This repository's issues are reserved for feature requests and bug reports.

• What is the current behavior?

  File "/Users/noj/recurrency/legacy-api/v4/graphql.py", line 1, in <module>
    import graphene
  File "/opt/homebrew/lib/python3.9/site-packages/graphene/__init__.py", line 3, in <module>
    from .types import (
  File "/opt/homebrew/lib/python3.9/site-packages/graphene/types/__init__.py", line 2, in <module>
    from graphql import ResolveInfo
  File "/Users/noj/recurrency/legacy-api/v4/graphql.py", line 3, in <module>
    class Query(graphene.ObjectType):
AttributeError: partially initialized module 'graphene' has no attribute 'ObjectType' (most likely due to a circular import)

• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via
  a github repo, https://repl.it or similar.

import graphene

class Query(graphene.ObjectType):
    hello = graphene.String(description='A typical hello world')

    def resolve_hello(self, info):
        return 'World'

schema = graphene.Schema(query=Query)

if __name__ == "__main__":
    query = '''
        query SayHello {
          hello
        }
    '''
    result = schema.execute(query)

    print (result)

• What is the expected behavior?

No errors.

• Please tell us about your environment:

  • Version: Python 3.9.7
  • Platform: Mac

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow)