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 B         


        

Answer 1

def foo1(x):
    try:
        return Baz(x)
    except:
        raise ValueError('Incorrect value fo Bac')

or

def foo3(x):
    return Baz(x) if  else False

I do not believe in half defined function, but this False can be usefull in search type failure pruning.