添加 1207.独一无二的出现次数python3版本

problems/1207.独一无二的出现次数.md

@@ -100,7 +100,21 @@ class Solution {
 ```
 
 Python：
-
+```python
+class Solution:
+    def uniqueOccurrences(self, arr: List[int]) -> bool:
+        count = [0] * 2002
+        for i in range(len(arr)):
+            count[arr[i] + 1000] += 1 # 防止负数作为下标
+        freq = [False] * 1002 # 标记相同频率是否重复出现
+        for i in range(2001):
+            if count[i] > 0:
+                if freq[count[i]] == False:
+                    freq[count[i]] = True
+                else:
+                    return False
+        return True
+```
 Go：
 
 JavaScript：