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Update is_palindrome.py (#2025)

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* Update is_palindrome.py

* Update is_palindrome.py

* Reuse s

Co-authored-by: Christian Clauss <cclauss@me.com>
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Ashwin Das 2020-05-22 15:27:23 +05:30 committed by GitHub
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commit d8a4faf96d
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1 changed files with 10 additions and 1 deletions
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strings/is_palindrome.py
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@ -1,4 +1,4 @@
def is_palindrome(s):
def is_palindrome(s: str) -> bool:
"""
Determine whether the string is palindrome
:param s:
@ -7,7 +7,16 @@ def is_palindrome(s):
True
>>> is_palindrome("Hello")
False
>>> is_palindrome("Able was I ere I saw Elba")
True
>>> is_palindrome("racecar")
True
>>> is_palindrome("Mr. Owl ate my metal worm?")
True
"""
# Since Punctuation, capitalization, and spaces are usually ignored while checking Palindrome,
# we first remove them from our string.
s = "".join([character for character in s.lower() if character.isalnum()])
return s == s[::-1]