Is it ok to skip "return None"?

Question

I wonder if it is bad manner to skip return None, when it is not needed.

Example:

def foo1(x):
    if [some condition]:
        return Baz(x)
    else:
        return None

def foo2(x):
    if [some condition]:
        return Baz(x)

bar1 = foo1(x)
bar2 = foo2(x)

In both cases, when condition is false, function will return with None.

Answer 1

Like you said, return None is (almost) never needed.

But you should consider that the intention of your code is much clearer with an explicit return None. Remember: a piece of code also needs to be readable by human-beings, and being explicit usually helps.