inter + reunion digits py

from functools import reduce

def getDigsFromNr(nr):
    ans = set()
    if nr != 0:
        ans.add(nr % 10)
        ans.update(getDigsFromNr(nr // 10))
    return ans

def getReunionAndInter(nrSet):
    def unionRed(acc, elem):
        return acc.union(getDigsFromNr(elem))
    def interRed(acc, elem):
        return acc.intersection(getDigsFromNr(elem))
    union = reduce(unionRed, nrSet, set())
    inter = reduce(interRed, nrSet, getDigsFromNr(list(nrSet)[0]))
    return union, inter

print(getReunionAndInter({1234, 123, 127}))