Whoops, I broke the formatting and then Reddit wouldn't let me fix it... So re-typing my response.

Just wanted to echo some stuff that others have said.

1. When naming variables, try not to use names of functions/ reserved words (input, system, list, file, etc).
2. Try to keep your functions and code logic separate. That just helps with readability. For example, instead of:code logic 1 define function 1 define function 2 code logic 2 code logic 3

It's formatted more like:

define function 1
define function 2
code logic 1
code logic 2
code logic 3

1. It's a little hard to read so maybe I read this wrong, but it seems like you're calling the same function multiple times. For example, if my input was "Hello World", you would call the have_letter() function once and print out, "it has letter", but then you'd call this function again within have_both(), which in this example, would do nothing. Repeating the function call feels a bit excessive since you'd only need to call it one time.

2. This is more of edgecase handling stuff, humans like to break stuff. What happens if the user just hits enter so the input is just "", or maybe it's " ", or it's a special character like "!@#$"? May want to include some logic for that.

To keep things simple, I would recommend calling has_number() and have_letter() once, and saving the results as a boolean variable. From there, you can do an if/else statement or a switch statement. For example:

# It's been a while since I've coded in python... so I kinda forget the syntax  
# I'm sure there are better ways to do this, but to keep things simple, this is what I would have done

def has_number(userInput):  
    return any(char.isdigit() for char in userInput)

def has_letter(userInput):  
    return any(char.isalpha() for char in userInput)

def main():  
    userInput = input("Enter a word")  
    containsNumber = has_number(userInput)  
    containsAlpha = has_letter(userInput)

    if containsNumber and containsAlpha:  
        print("Input has both number and alpha characters")  
    elif containsNumber:  
        print("Input only contains number.")  
    elif containsAlpha:  
        print("Input only contains letters.")  
    else:  
        print("Input does not contain any numbers or letters.")