>>>"llo"in"hello, python"True>>>"lol"in"hello, python"False 2、使用 find 方法 使用 字符串 对象的 find 方法,如果有找到子串,就可以返回指定子串在字符串中的出现位置,如果没有找到,就返回-1 代码语言:javascript 代码运行次数:0 运行 AI代码解释 >>>"hello, python".find("llo")!=-1True>>>"...
rindex:从右向左查找元素第一次出现的位置,返回正向下标,找不到报错 区别:find、rfind找不到元素返回值-1,而index、rindex则报错 print(str1.find('爱'),'find输出') print(str1.find('爱',7),'find输出') print(str1.rfind('爱'),'rfind输出') print(str1.rfind('爱',7),'rfind输出') print(s...
string.digits:数字0~9 string.letters:所有字母(大小写) string.lowercase:所有小写字母 string.printable:可打印字符的字符串 string.punctuation:所有标点 string.uppercase:所有大写字母 1. 2. 3. 4. 5. 6. 1. >>> import string 2. >>> string.digits 3. '0123456789' 4. >>> string.letters 5. ...
Strings can beconcatenatedto build longer strings using the plus sign and also they can bemultipliedby a number, which results in the continuous repetition of the string as many times as the number indicates. Also, if we want to find out thelengthof the string, we simply have to use thelen...
模块string,虽然风头已小,但其包含了一些字符串方法中没有的常量和函数,故将模块string中几个非常有用的常量列出: 1string.digits: 包含数字0-9的字符串;2string.ascii_letters: 包含所有ASCII字母(大写和小写)的字符串;3string.ascii_lowercase: 包含所有小写ASCII字母的字符串;4string.printable: 包含所有可打印...
importstringprint(string.ascii_letters + string.digits)#输出所有的大小写字母+(0-9)的数字print(string.ascii_letters)#输出大小写的英文字母,执行结果:abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZprint(string.ascii_lowercase)#输出小写英文字母,执行结果:abcdefghijklmnopqrstuvwxyzprint(string.ascii_upperca...
``` # Python script to generate random text import random import string def generate_random_text(length): letters = string.ascii_letters + string.digits + string.punctuation random_text = ''.join(random.choice(letters) for i in range(length)) return random_text ``` 说明: 此Python脚本生成...
The string whose method is called is inserted in between each given string. The result is returned as a new string. Example: '.'.join(['ab', 'pq', 'rs']) -> 'ab.pq.rs' """pass 看了构造就知道函数内需要传入可迭代对象,所以我们先传入一个列表演示一下。
#$%&@_~' password_choices = string.ascii_letters + string.digits + special_characterswhileTrue: password = ''.join(secrets.choice(password_choices) for _ in range(random.randint(8, 16)))if (any(c.islower() for c in password)and any(c.isupper() for c in password)and sum(spe...
find(sub[,start[,end]]):检测字符串中是否包含子字符串sub,如果指定start(开始)和end(结束)范围,则检查是否包含在指定范围内,如果包含子字符串返回开始的索引值,否则返回-1index(sub[,start[,end]]):跟find()方法一样,只不过如果sub不在string中会抛出ValueError异常。rfind(sub[,start[,end]]):类似于...