Update code style for Python

codes/python/chapter_hashing/array_hash_map.py

@@ -4,69 +4,70 @@ Created Time: 2022-12-14
 Author: msk397 (machangxinq@gmail.com)
 """
 
-""" 键值对 int->String """
 class Entry:
+    """ 键值对 int->String """
     def __init__(self, key, val):
         self.key = key
         self.val = val
 
-""" 基于数组简易实现的哈希表 """
 class ArrayHashMap:
+    """ 基于数组简易实现的哈希表 """
     def __init__(self):
+        """ 构造方法 """
         # 初始化一个长度为 100 的桶（数组）
         self.bucket = [None] * 100
 
-    """ 哈希函数 """
     def hash_func(self, key):
+        """ 哈希函数 """
         index = key % 100
         return index
 
-    """ 查询操作 """
     def get(self, key):
+        """ 查询操作 """
         index = self.hash_func(key)
         pair = self.bucket[index]
         if pair is None:
             return None
         return pair.val
 
-    """ 添加操作 """
     def put(self, key, val):
+        """ 添加操作 """
         pair = Entry(key, val)
         index = self.hash_func(key)
         self.bucket[index] = pair
 
-    """ 删除操作 """
     def remove(self, key):
+        """ 删除操作 """
         index = self.hash_func(key)
         # 置为 None ，代表删除
         self.bucket[index] = None
 
-    """ 获取所有键值对 """
     def entry_set(self):
+        """ 获取所有键值对 """
         result = []
         for pair in self.bucket:
             if pair is not None:
                 result.append(pair)
         return result
 
-    """ 获取所有键 """
     def key_set(self):
+        """ 获取所有键 """
         result = []
         for pair in self.bucket:
             if pair is not None:
                 result.append(pair.key)
         return result
 
-    """ 获取所有值 """
     def value_set(self):
+        """ 获取所有值 """
         result = []
         for pair in self.bucket:
             if pair is not None:
                 result.append(pair.val)
         return result
 
-    """ 打印哈希表 """
     def print(self):
+        """ 打印哈希表 """
         for pair in self.bucket:
             if pair is not None:
                 print(pair.key, "->", pair.val)