Update benchmark of relation/import/GlobalImport

[thisrabbit]

Background

Currently the benchmark case demonstrating global import dependency involves in circular dependency, which makes the case too ambiguous and confusing.

Given that case, python module_a.py will work fine, however python module_b.py will throw the following error:

Traceback (most recent call last):
  File "...\module_b.py", line 1, in <module>
    from module_a import func as f, x as x_b, ClassA as c
  File "...\module_a.py", line 1, in <module>
    import module_b
  File "...\module_b.py", line 1, in <module>
    from module_a import func as f, x as x_b, ClassA as c
ImportError: cannot import name 'func' from partially initialized module 'module_a' (most likely due to a circular import) (...\module_a.py)

If you move the first line of module_a.py (import module_b) to the last, then both commands will work properly.

This is something related to circular import, and to understand this concept, I would recommend reading this SO post.

Suggestion

Separate this benchmark case into standalone cases that demonstrate regular imports and circular imports respectively.