Add C++, Python, Go code for chapter_hashing

codes/python/chapter_hashing/hash_map.py

@@ -0,0 +1,46 @@
+"""
+File: hash_map.py
+Created Time: 2022-12-14
+Author: msk397 (machangxinq@gmail.com)
+"""
+
+if __name__ == "__main__":
+    """ 初始化哈希表 """
+    Map = {}
+
+    """ 添加操作 """
+    # 在哈希表中添加键值对 (key, value)
+    Map[12836] = "小哈"
+    Map[15937] = "小啰"
+    Map[16750] = "小算"
+    Map[13276] = "小法"
+    Map[10583] = "小鸭"
+    print("\n添加完成后，哈希表为\nKey -> Value")
+    for key, value in Map.items():
+        print(key, "->", value)
+
+    """ 查询操作 """
+    # 向哈希表输入键 key ，得到值 value
+    name = Map[15937]
+    print("\n输入学号 15937 ，查询到姓名 " + name)
+
+    """ 删除操作 """
+    # 在哈希表中删除键值对 (key, value)
+    Map.pop(10583)
+    print("\n删除 10583 后，哈希表为\nKey -> Value")
+    for key, value in Map.items():
+        print(key, "->", value)
+
+    """ 遍历哈希表 """
+    print("\n遍历键值对 Key->Value")
+    for key, value in Map.items():
+        print(key, "->", value)
+
+    print("\n单独遍历键 Key")
+    for key in Map.keys():
+        print(key)
+
+    print("\n单独遍历值 Value")
+    for val in Map.values():
+        print(val)
+