Wemake-python-styleguide: Forbid local variables that are only used in `return` statements

[sobolevn]

Rule request

Thesis

Sometimes I see code like this:

def function():
     ...
     some_value = ...
     return some_value

What the point in creating this intermediate variable? Why do we need it?

Reasoning

This is done for consistency and more readable source code.

[loucadufault]

Can I start working on this ? To clarify the fix would be to remove all these intermediate variables in all function returns?

[sobolevn]

@loucadufault you are welcome!

The fix would be to return a direct value.

Wrong:

def some_function():
     some_value = 1
     return some_value

Correct:

def some_function():
     return 1

[Chinmaygoyal]

Can I work on this issue?

[SizovIgor]

@Chinmaygoyal I am on finish line to complete this issue

[sobolevn]

@Chinmaygoyal feel free to take #545

[DmytroLitvinov]

Hello @sobolevn
The immediate value is good in the next case:

def function(a):
     result = None
     if a:
         ...  # some actions
        result = 123

     return result

As for me, it is also understandable from the naming of value what we will return after calling of function.

[sobolevn]

@DmytroLitvinov yes, this code is valid.

What do you mean by:

As for me, it is also understandable from the naming of value what we will return after calling of function.

[DmytroLitvinov]

https://github.com/sbdchd/flake8-pie