Do if by denying a boolean in Python

Question

How do I make for the if check a boolean negation, as below:

self.senha = Gugu_0099

    for i in self.senha:
         if i.isdigit() and i.isalpha():
               total_simbolos += 1

I want you to get into this if if the character is neither number nor alphabet.
When studying PHP it was possible to use exclamation to show negation, for example:
!i.isdigital()

Answer 1

Just use the not.

condition = False

if not condition:
  print('Entrou no if')

Answer 2

You can do it like this:

if not (u0 <= u <= u0+step):
    u0 = u0+ step # change the condition until it is satisfied
else:
    do sth. # condition is satisfied

is just an example of if, is just you adjust the conditions of if.