python字典底层
时间: 2023-09-15 19:21:08 浏览: 113
Python字典底层实现的是哈希表。哈希表是一种数据结构,它通过哈希函数将键(key)转换成唯一的地址(索引),然后将值(value)存储在对应的地址中。Python内置的哈希函数会对键进行哈希运算和取余运算,以获得唯一的地址。当多个键经过哈希运算后得到相同的地址时,会发生哈希碰撞,Python会使用开放定址法或链表法来解决碰撞问题。对于相同的键,后面的赋值操作会直接覆盖前面的值,因为它们会计算得到相同的地址。因此,Python字典的底层实现是基于哈希表的。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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