topic description
字符串有三种编辑操作:插入一个英文字符、删除一个英文字符或者替换一个英文字符。 给定两个字符串，编写一个函数判定它们是否只需要一次(或者零次)编辑。
示例 1:
输入:
first = "pale"
second = "ple"
输出: True
示例 2:
输入:
first = "pales"
second = "pal"
输出: False
来源：力扣（LeetCode）
链接：https://leetcode.cn/problems/one-away-lcci
著作权归领扣网络所有。商业转载请联系官方授权，非商业转载请注明出处。Start solving problems (python)
practical application
This function is used to determine whether two strings differ by only one edit operation.
A practical application can be to realize the automatic error correction function in the text editor . For example, when the user enters a wrong word, this function can be used to judge whether there is only one edit operation difference between the word entered by the user and the correct word, and if so, the word entered by the user can be automatically corrected. In addition, this function can also be used in string matching and comparison scenarios, such as spell checking, file comparison, etc.
absorb learning
