def isIPv4Address(inputString):
    p = inputString.split('.')
    return len(p) == 4 and all(n.isdigit() and 0 <= int(n) <= 255 for n in p)

c057fc81f6bf814f8e86ba1e68b2c6006a4d3745
<mask token>

def isIPv4Address(inputString):
    p = inputString.split('.')
    return len(p) == 4 and all(n.isdigit() and 0 <= int(n) <= 255 for n in p)
