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curriculum/challenges/english/blocks/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md

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--description--

Now, turn the empty string in the constraint tuple into a regex pattern to match a single digit. Use a character class specifying each digit from 0 to 9.

--hints--

You should have the (nums, '[0123456789]') tuple in your constraints list.

js
({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })

--seed--

--seed-contents--

py
import re
import secrets
import string


def generate_password(length, nums, special_chars, uppercase, lowercase):
    # Define the possible characters for the password
    letters = string.ascii_letters
    digits = string.digits
    symbols = string.punctuation

    # Combine all characters
    all_characters = letters + digits + symbols

    while True:
        password = ''
        # Generate password
        for _ in range(length):
            password += secrets.choice(all_characters)
--fcc-editable-region--        
        constraints = [
            (nums, '')
        ]        
--fcc-editable-region--
    return password
    
# new_password = generate_password(8)
# print(new_password)

pattern = 'w[ha]'
quote = 'Not all those who wander are lost.'
# print(re.findall(pattern, quote))