Python `if x is not None` or `if not x is None`?
Is there a difference between "if not x" and "if x is None"?
Why does this return None? Difference between 'not x' and 'x==None' in python Python : Is None the same as ""? Why does this python function return None python difference between (x is not None) and (y is not None) and (x and y) is not None Why do my_list[None:] and my_list[:None] return my_list? Why does this code print None? Difference between "if x" and "if x is not None" Python function return None. Why? The None value in Python Python and is not None Why is this None type? Should I Return None or (None, None)? why list(print(x.upper(), end=' ') for x in 'spam') gets a [None, None, None, None] list? Why does this function return "None None" as well? Why is this value being set to None? Why does my recursive python function return None? Why does this also return None What is the difference between " is None " and " ==None " If none of the above python None after output Why does `for x in list[None:None]:` work? What is a None value? using None in Python Python list return 'None' Why I get 'None' python .get() and None Return None in Python In Python, why is list(None) an error but [None] is not?