mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-27 05:36:29 +08:00
113 lines
2.8 KiB
Python
113 lines
2.8 KiB
Python
"""
|
||
File: array_hash_map.py
|
||
Created Time: 2022-12-14
|
||
Author: msk397 (machangxinq@gmail.com)
|
||
"""
|
||
|
||
""" 键值对 int->String """
|
||
class Entry:
|
||
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:
|
||
def __init__(self):
|
||
# 初始化一个长度为 100 的桶（数组）
|
||
self.bucket = [None] * 100
|
||
|
||
""" 哈希函数 """
|
||
def hashFunc(self, key):
|
||
index = key % 100
|
||
return index
|
||
|
||
""" 查询操作 """
|
||
def get(self, key):
|
||
index = self.hashFunc(key)
|
||
pair = self.bucket[index]
|
||
if pair is None:
|
||
return None
|
||
return pair.val
|
||
|
||
""" 添加操作 """
|
||
def put(self, key, val):
|
||
pair = Entry(key, val)
|
||
index = self.hashFunc(key)
|
||
self.bucket[index] = pair
|
||
|
||
""" 删除操作 """
|
||
def remove(self, key):
|
||
index = self.hashFunc(key)
|
||
# 置为None，代表删除
|
||
self.bucket[index] = None
|
||
|
||
""" 获取所有键值对 """
|
||
def entrySet(self):
|
||
result = []
|
||
for pair in self.bucket:
|
||
if pair is not None:
|
||
result.append(pair)
|
||
return result
|
||
|
||
""" 获取所有键 """
|
||
def keySet(self):
|
||
result = []
|
||
for pair in self.bucket:
|
||
if pair is not None:
|
||
result.append(pair.key)
|
||
return result
|
||
|
||
""" 获取所有值 """
|
||
def valueSet(self):
|
||
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):
|
||
for pair in self.bucket:
|
||
if pair is not None:
|
||
print(pair.key, "->", pair.val)
|
||
|
||
|
||
""" Driver Code """
|
||
if __name__ == "__main__":
|
||
""" 初始化哈希表 """
|
||
mapp = ArrayHashMap()
|
||
|
||
""" 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")
|
||
mapp.put(16750, "小算")
|
||
mapp.put(13276, "小法")
|
||
mapp.put(10583, "小鸭")
|
||
print("\n添加完成后，哈希表为\nKey -> Value")
|
||
mapp.print()
|
||
|
||
""" 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 """
|
||
# 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 """
|
||
print("\n遍历键值对 Key->Value")
|
||
for pair in mapp.entrySet():
|
||
print(pair.key, "->", pair.val)
|
||
|
||
print("\n单独遍历键 Key")
|
||
for key in mapp.keySet():
|
||
print(key)
|
||
|
||
print("\n单独遍历值 Value")
|
||
for val in mapp.valueSet():
|
||
print(val)
|