Update 0763.划分字母区间.md

Added python version code

problems/0763.划分字母区间.md

@@ -108,7 +108,23 @@ class Solution {
 ```
 
 Python：
+```python
+class Solution:
+    def partitionLabels(self, s: str) -> List[int]:
+        hash = [0] * 26
+        for i in range(len(s)):
+            hash[ord(s[i]) - ord('a')] = i
+        result = []
+        left = 0
+        right = 0
+        for i in range(len(s)):
+            right = max(right, hash[ord(s[i]) - ord('a')])
+            if i == right:
+                result.append(right - left + 1)
+                left = i + 1
+        return result
 
+```
 
 Go：