Commit 8197f0a

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feat: 125.valid-palindrome add Python3 implementation (azl397985856#83)

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Original file line number	Diff line number	Diff line change
`@@ -48,7 +48,7 @@ Output: false`
`48`	`48`
`49`	`49`	`## 代码`
`50`	`50`
`51`		`-* 语言支持:JS,C++`
	`51`	`+* 语言支持:JS,C++,Python`
`52`	`52`
`53`	`53`	`JavaScript Code:`
`54`	`54`
`@@ -117,3 +117,31 @@ public:`
`117`	`117`	`}`
`118`	`118`	`};`
`119`	`119`	```
	`120`	`+`
	`121`	`+Python Code:`
	`122`	`+`
	`123`	+```python
	`124`	`+class Solution:`
	`125`	`+ def isPalindrome(self, s: str) -> bool:`
	`126`	`+ left, right = 0, len(s) - 1`
	`127`	`+ while left < right:`
	`128`	`+ if not s[left].isalnum():`
	`129`	`+ left += 1`
	`130`	`+ continue`
	`131`	`+ if not s[right].isalnum():`
	`132`	`+ right -= 1`
	`133`	`+ continue`
	`134`	`+ if s[left].lower() == s[right].lower():`
	`135`	`+ left += 1`
	`136`	`+ right -= 1`
	`137`	`+ else:`
	`138`	`+ break`
	`139`	`+ return right <= left`
	`140`	`+`
	`141`	`+ def isPalindrome2(self, s: str) -> bool:`
	`142`	`+ """`
	`143`	`+ 使用语言特性进行求解`
	`144`	`+ """`
	`145`	`+ s = ''.join(i for i in s if i.isalnum()).lower()`
	`146`	`+ return s == s[::-1]`
	`147`	+```

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