Format python codes with black. (#453)

codes/python/chapter_hashing/array_hash_map.py

@@ -4,26 +4,30 @@ Created Time: 2022-12-14
 Author: msk397 (machangxinq@gmail.com)
 """
 
+
 class Entry:
-    """ 键值对 int->String """
+    """键值对 int->String"""
+
     def __init__(self, key: int, val: str):
         self.key = key
         self.val = val
 
+
 class ArrayHashMap:
-    """ 基于数组简易实现的哈希表 """
+    """基于数组简易实现的哈希表"""
+
     def __init__(self):
-        """ 构造方法 """
+        """构造方法"""
         # 初始化数组，包含 100 个桶
         self.buckets: list[Entry | None] = [None] * 100
 
     def hash_func(self, key: int) -> int:
-        """ 哈希函数 """
+        """哈希函数"""
         index: int = key % 100
         return index
 
     def get(self, key: int) -> str:
-        """ 查询操作 """
+        """查询操作"""
         index: int = self.hash_func(key)
         pair: Entry = self.buckets[index]
         if pair is None:
@@ -31,19 +35,19 @@ class ArrayHashMap:
         return pair.val
 
     def put(self, key: int, val: str) -> None:
-        """ 添加操作 """
+        """添加操作"""
         pair = Entry(key, val)
         index: int = self.hash_func(key)
         self.buckets[index] = pair
 
     def remove(self, key: int) -> None:
-        """ 删除操作 """
+        """删除操作"""
         index: int = self.hash_func(key)
         # 置为 None ，代表删除
         self.buckets[index] = None
 
     def entry_set(self) -> list[Entry]:
-        """ 获取所有键值对 """
+        """获取所有键值对"""
         result: list[Entry] = []
         for pair in self.buckets:
             if pair is not None:
@@ -51,7 +55,7 @@ class ArrayHashMap:
         return result
 
     def key_set(self) -> list[int]:
-        """ 获取所有键 """
+        """获取所有键"""
         result: list[int] = []
         for pair in self.buckets:
             if pair is not None:
@@ -59,7 +63,7 @@ class ArrayHashMap:
         return result
 
     def value_set(self) -> list[str]:
-        """ 获取所有值 """
+        """获取所有值"""
         result: list[str] = []
         for pair in self.buckets:
             if pair is not None:
@@ -67,7 +71,7 @@ class ArrayHashMap:
         return result
 
     def print(self) -> None:
-        """ 打印哈希表 """
+        """打印哈希表"""
         for pair in self.buckets:
             if pair is not None:
                 print(pair.key, "->", pair.val)
@@ -75,10 +79,10 @@ class ArrayHashMap:
 
 """ Driver Code """
 if __name__ == "__main__":
-    """ 初始化哈希表 """
+    # 初始化哈希表
     mapp = ArrayHashMap()
 
-    """ 添加操作 """
+    # 添加操作
     # 在哈希表中添加键值对 (key, value)
     mapp.put(12836, "小哈")
     mapp.put(15937, "小啰")
@@ -88,18 +92,18 @@ if __name__ == "__main__":
     print("\n添加完成后，哈希表为\nKey -> Value")
     mapp.print()
 
-    """ 查询操作 """
+    # 查询操作
     # 向哈希表输入键 key ，得到值 value
     name = mapp.get(15937)
     print("\n输入学号 15937 ，查询到姓名 " + name)
 
-    """ 删除操作 """
+    # 删除操作
     # 在哈希表中删除键值对 (key, value)
     mapp.remove(10583)
     print("\n删除 10583 后，哈希表为\nKey -> Value")
     mapp.print()
 
-    """ 遍历哈希表 """
+    # 遍历哈希表
     print("\n遍历键值对 Key->Value")
     for pair in mapp.entry_set():
         print(pair.key, "->", pair.val)