Ques - Check whether a character is an alphabet, digit or special character

I have written a python code solution and it is working well. But when I input ("@"), I get the output as an alphabet instead of special character. Can someone tell me why and how to solve it for @.

inp = input("Enter anything : ")
if inp >= "a" and inp <= "z" or inp >= "A" and inp <= "Z":
   print("input is alphabet")
elif inp>="0":
   print("input is number")
else:
   print("special character")

CodePudding user response：

elif inp>="0" and inp<="9":
   print("input is number")

You need to specify the end for the set of numbers. Everything else should stay the same.

CodePudding user response：

You could also utilize Python's String methods isalpha() and isnumeric().

def get_char():
    """
    Prompt user for character input, or exit if user
    enters more than a single character.
    :return: The user input character.
    """
    inp = input("Enter any character: ")
    if len(inp) != 1: 
        print("Invalid entry, please try again.")
        exit(65) # os.EX_DATAERR, but portable
    return inp

def check_char(inp):
    """
    Inspect character to determine if it is alpha, numeric, or special.
    :param inp: The character to inspect.
    :return: String indicating character identification. 
    """
    if inp.isalpha():
        msg=f'{inp} is alpha char'
    elif inp.isnumeric():
        msg=f'{inp} is numeric char'
    else:
        msg=f'{inp} is special char'
    return msg
    
while True:
    print(check_char(get_char()))

CodePudding user response：

Just add a special catagory for special char

import re

inp = input("Enter anything : ")
if inp >= "a" and inp <= "z" or inp >= "A" and inp <= "Z":
   print("input is alphabet")
elif inp>="0" and inp<="9":
   print("input is number")

special_characters = "!@#$%^&*()- ?_=,<>/"
if (any(c in special_characters for c in inp)):
   print("special character")

CodePudding user response：

You could also rely on the string module and check if a group contains your input:

import string

inp = input("Enter anything : ")

if inp in string.ascii_letters:
    print("input is alphabet")
elif inp in string.digits:
    print("input is number")
else:
    print("special character")