प्रोग्राम की सुविधाएँ · स्थिर संस्करणों के caret अंतराल

def caret_admits(base, candidate):
    for version in (base, candidate):
        if type(version) not in (list, tuple) or len(version) != 3 or any(type(x) is not int or x < 0 for x in version):
            raise ValueError("version.triplet")
    major, minor, patch = base
    upper = (major+1, 0, 0) if major else ((0, minor+1, 0) if minor else (0, 0, patch+1))
    return tuple(base) <= tuple(candidate) < upper