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37 lines
825 B
37 lines
825 B
#! /usr/bin/env python3
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# find all possible permutations of a sequence of phone pad digits (other than 1 and 0)
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from itertools import chain
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mappings = {
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2 : "ABC",
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3 : "DEF",
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4 : "GHI",
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5 : "JKL",
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6 : "MNO",
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7 : "PQRS",
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8 : "TUV",
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9 : "WXYZ"
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}
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def generate(letter, letters):
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return [letter + c for c in letters]
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def genWords(one, two):
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return list(chain.from_iterable([generate(c, two) for c in one]))
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def genAll(lettersets):
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if len(lettersets) == 1:
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return lettersets
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first = lettersets[0]
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rest = lettersets[1:]
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return [genWords(first, ls) for ls in genAll(rest)]
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def numToWords(num):
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lettersets = [mappings[int(n)] for n in num]
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return genAll(lettersets)[0]
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for num in numToWords("353346"):
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print(num)
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