# File: strtype.py
# Returns the number of types of characters in a string
#
# Matt Bishop, MHI 289I, Fall 2021
#
#
while True:
    # read in a string; quit on EOF
    try:
        instr = input("Enter a string: ")
    except EOFError:
        break
    except:
        print("Unknown error; EOF to end")
        continue
    #
    # put quotes around the string to show its boundaries when it is printed
    #
    prstr = '"' + instr + '"'
    print(prstr)
    #
    # now test the character types
    #
    nuttin = True
    if instr.isalpha():
        print(prstr, "contains only letters")
        nuttin = False
    if instr.isalnum():
        print(prstr, "contains only alphanumeric characters")
        nuttin = False
    if instr.isdigit():
        print(prstr, "contains only digits")
        nuttin = False
    if instr.isspace():
        print(prstr, "contains only white space")
        nuttin = False
    if instr.isupper():
        print(prstr, "contains only upper case letters")
        nuttin = False
    if instr.islower():
        print(prstr, "contains only lower case letters")
        nuttin = False
    if nuttin:
        print(prstr, "has a mix of letters, digits, symbols, and white space")