password validation without regex

# Answer to http://dpaste.com/37ZVD3M


import string


def validate(password):
    """
    Its a general password validation question
    - one uppercase
    - one lowecase
    - special charater .,/
    - posivitve integer
    """
    # Minimum one uppercase
    if not any(c.isupper() for c in password):
        return False

    # Minimum one lowercase
    if not any(c.islower() for c in password):
        return False

    # . or , or / are required
    if not any(c in ".,/" for c in password):
        return False

    # Minimum one digit in password
    if not any(c in string.digits for c in password):
        return False

    # No negative integers in str
    if any(
        last == "-" and current.isdigit()
        for (last, current)
        in zip(*[iter(password)] * 2)
    ):
        return False

    return True