Python字符串中含有某子字符串的个数

python版

str1 = "abskfirgnlskgabndf"
str2 = "ab"
num = (len(str1) - len(str1.replace(str2,""))) // len(str2)
Java版

public class StrNum {
 
    public static void main(String[] args) {
        String str1 = "abskfirgnlskgabndf";
        String str2 = "ab";
        int num = (str1.length() - str1.replace(str2,"").length()) / str2.length();
        System.out.println(num);
        
    }
 
}
 

https://blog.youkuaiyun.com/a857553315/article/details/80934664