https://github.com/hugoferreira/golf-during-covid/blob/master/day4.md

ana.io.py

import re as e
import sys as y
from collections import defaultdict as d
o,r=sorted,d(set)
[r["".join(o(w))].add(w)for w in e.split("\W"," ".join(y.stdin).lower())if len(w)==int(y.argv[1])]
[print(w+": "+",".join(o(r[w])))for w in o(r)]

ana.py

import re as e
import sys
from collections import defaultdict as d


def ana(n: int, s: str) -> str:
 o,r=sorted,d(set)
 [r["".join(o(w))].add(w)for w in e.split("\W",s.lower())if len(w)==n]
 return "\n".join([w+": "+",".join(o(r[w]))for w in o(r)])

if __name__ == "__main__":
 print(ana(int(sys.argv[1]), " ".join(sys.stdin)))

test_ana.py

from ana import ana


def test_1():
    s = "Thou hast ignore the region where the ringer and the singer resigns. The signer, Has Kell"
    assert ana(6, s) == "eginor: ignore,region\neginrr: ringer\neginrs: signer,singer"


def test_2():
    s = "Thou hast ignore the region where the ringer and the singer resigns. The signer, Has Kell"
    assert ana(4, s) == "ahst: hast\nekll: kell\nhotu: thou"


def test_3():
    s = "Thou.hast.ignore.the.region.where.the.ringer.and.the.singer.resigns.The.signer,Has.Kell!"
    assert ana(4, s) == "ahst: hast\nekll: kell\nhotu: thou"


def test_4():
    s = "Thou hast ignore the region where the ringer and the singer resigns. The signer, Has Kell"
    assert ana(2, s) == ""


def test_5():
    s = "cab"
    assert ana(3, s) == "abc: cab"


def test_6():
    s = ""
    assert ana(3, s) == ""


def test_7():
    s = "cba aaaa abc bbbb abc bca zzzz"
    assert ana(3, s) == "abc: abc,bca,cba"


def test_8():
    s = "bca bcd abc acb cdb the abc"
    assert ana(3, s) == "abc: abc,acb,bca\nbcd: bcd,cdb\neht: the"