In python, how do you check if a string has both uppercase and lowercase letters

Question

I\'ve looked at the other post similar to my question, Password check- Python 3, except my question involves checking if the password contains both uppercase and lower case

Answer 1

You could use regular expression :

i.e. :

def Valid_mixed_password(password):
    lower = re.compile(r'.*[a-z]+') # Compile to match lowercase
    upper = re.compile(r'.*[A-Z]+') # Compile to match uppercase
    if lower.match(password) and upper.match(password): # if the password contains both (lowercase and uppercase letters) then return True
        return True
    else: # Else, the password does not contains uppercase and lowercase letters then return False
        return False

>>> print Valid_mixed_password("hello")
False
>>> print Valid_mixed_password("HELLO")
False
>>> print Valid_mixed_password("HellO")
True
>>> print Valid_mixed_password("heLLo")
True

Hope it helps.