python - 什么是 Python 3 中的 find()？

Question

我正在为 Python 编写 MIT 开放课件，但对以下示例感到困难:

To get started, we are going to use some built-in Python functions. To use these functions, include the statement from string import * at the beginning of your file. This will allow you to use Python string functions. In particular, if you want to find the starting point of the first match of a keyword string key in a target string target you could use thefind function. Try running on some examples, such as find("atgacatgcacaagtatgcat","atgc") Note how it returns the index of the first instance of the key in the target. Also note that if no instance of the key exists in the target, e.g, find("atgacatgcacaagtatgcat","ggcc") it returns the value -1.

python 2.4(左右)的类(class)，但我正在尝试在 Py3 中完成作业.. 学习沿途的差异。

Answer 1

使用字符串的.find() 方法，而不是string.find()。 (这在 python 2 中也有效，并且可能更可取)。