019f8fd211
git-subtree-dir: users/wpcarro git-subtree-mainline:464bbcb15cgit-subtree-split:24f5a642afChange-Id: I6105b3762b79126b3488359c95978cadb3efa789
49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
from collections import Counter
|
|
import unittest
|
|
|
|
|
|
################################################################################
|
|
# Impl
|
|
################################################################################
|
|
# palindromifiable :: String -> Boolean
|
|
def has_palindrome_permutation(x):
|
|
bag = Counter(x)
|
|
odd_entries_ct = 0
|
|
|
|
for _, y in bag.items():
|
|
if y % 2 != 0:
|
|
odd_entries_ct += 1
|
|
|
|
return odd_entries_ct in {0, 1}
|
|
|
|
|
|
################################################################################
|
|
# Tests
|
|
################################################################################
|
|
class Test(unittest.TestCase):
|
|
def test_permutation_with_odd_number_of_chars(self):
|
|
result = has_palindrome_permutation('aabcbcd')
|
|
self.assertTrue(result)
|
|
|
|
def test_permutation_with_even_number_of_chars(self):
|
|
result = has_palindrome_permutation('aabccbdd')
|
|
self.assertTrue(result)
|
|
|
|
def test_no_permutation_with_odd_number_of_chars(self):
|
|
result = has_palindrome_permutation('aabcd')
|
|
self.assertFalse(result)
|
|
|
|
def test_no_permutation_with_even_number_of_chars(self):
|
|
result = has_palindrome_permutation('aabbcd')
|
|
self.assertFalse(result)
|
|
|
|
def test_empty_string(self):
|
|
result = has_palindrome_permutation('')
|
|
self.assertTrue(result)
|
|
|
|
def test_one_character_string(self):
|
|
result = has_palindrome_permutation('a')
|
|
self.assertTrue(result)
|
|
|
|
|
|
unittest.main(verbosity=2)
|