Check character type

nonalphabetic.py

def is_number(n):
    try:
        float(n)
        return True
    except ValueError:
        return False
        
def is_symbol(n):
    if n.isalnum() == False:
        return True
    else:
        return False

quechuchaes.py

from nonalphabetic import *

quees = raw_input(">>> ")

if is_number(quees) == True:
    print "Es numero."
elif is_symbol(quees) == True:
    print "No es letra ni numero."
elif quees == quees.upper():
    print "Es letra mayuscula."
elif quees == quees.lower():
    print "Es letra minuscula"