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#! /usr/bin/python3
import re
def sortstring(a):
words = a.split(" ")
out = words.copy()
pr = re.compile(r'^(.*?)([0-9]+)$')
for w in words:
c = pr.search(w)
index = int(c.group(2)) - 1
out[index] = c.group(1)
return " ".join(out)
import unittest
class TestSortstring(unittest.TestCase):
def test_ex1(self):
self.assertEqual(sortstring("and2 Raku3 cousins5 Perl1 are4"), "Perl and Raku are cousins", 'example 1')
def test_ex2(self):
self.assertEqual(sortstring("guest6 Python1 most4 the3 popular5 is2 language7"), "Python is the most popular guest language", 'example 2')
def test_ex3(self):
self.assertEqual(sortstring("Challenge3 The1 Weekly2"), "The Weekly Challenge", 'example 3')
unittest.main()
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