Checkio: House Password

My solution for Checkio assignment House Password:

def checkio(data):
        returnValue = True
        if (len(data) < 10) or (re.search("[A-Z]", data) == None) or (re.search("[a-z]", data) == None) or (re.search("[0-9]", data)) == None:
            returnValue = False
        return returnValue; 

Checkio: Non-unique elements

My solution for the second problem (called Non-unique elements) in checkio:

def checkio(data):
    return [x for x in data if data.count(x) >= 2]

Checkio: Extra dashes

My solution for the first problem in Checkio (http://www.checkio.com)

def checkio(line):
    return "-".join([x for x in line.split("-") if x != ""])