import sys
import string

password = input(
    """
    Please enter your password.
    Passwords must be more than 10 characters long,
    But less than 20 characters long.
    include both upper and lower case letters
    and atleast 1 special character.
    password can contain no spaces.
    type password here:""")

num_lowercase_letters = 0
num_uppercase_letters = 0
num_digits = 0
num_special_characters = 0

if not 10 <= len(password) <= 20:
     sys.exit("Password length not met, try again")

for i in password:
    if i in string.ascii_lowercase:
        num_lowercase_letters += 1
    elif i in string.ascii_uppercase:
        num_uppercase_letters += 1
    elif i in string.digits:
        num_digits += 1
    elif i in string.punctuation:
        num_special_characters += 1
    elif i == " ":
        sys.exit("spaces are not allowed. Please try again.")
    else:
        sys.exit("One of your characters is not allowed. Please try again.")

if num_lowercase_letters == 0:
    sys.exit("No lowercase letters detected, try again")
if num_uppercase_letters == 0:
    sys.exit("No uppercase letters detected, try again")
if num_digits == 0:
    sys.exit("No numbers detected, try again")
if num_special_characters == 0:
    sys.exit("No special characters detected, try again")

print("password setup complete. Password is %s" % (password))