how to count letters only in a string

[bleek veek]

hello,
I was stuck on a way to count the number of alphabetic characters in an input string, as well as a way to count the number of numeric characters. I've been toying with the isalpha and isdigit string methods, but can't figure anything out. So far I have:

def main():
    sentence = input('Enter a sentence: ')
    Stats(sentence)
 
def Stats(input):
    print('Total characters:', character(input))
    print('Letters:', letter(input))
    print('Digits:', digit(input))
 
def character(input):
    count = 0
    for char in input:
        count += 1
    return (count)
 
def letter(input):
# This is where I'm stuck.  Not sure how to use isalpha() 
# to make this work
 
def digit(input):
# here as well, but with the isdigit().

[Glenton]

Hi. It makes it a bit easier if you use the code tags (# button).

The structure of your code if very good and clear though.

Here's how you could adapt character to make letter

def letter(input)
    count=0
    for char in input:
        if isalpha(char):
            count += 1
    return count

Good luck!

Incidendally, I don't think isalpha is defined in plane python, so perhaps you have defined it separately or imported something? If not, an isalpha function might look like this:

def isalpha(x):
    return x in "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

[bvdet]

isalpha() and isdigit() are string methods and return boolean values.

>>> "a".isalpha()
True
>>> "1".isdigit()
True
>>> "1".isalpha()
False
>>> 

[Glenton]

Oh, yes. LOL. I told you I'm not doing enough python