>>>"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>>>"...
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...
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 AI检测代码解析 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...
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. ...
``` # 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...
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...
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...
importstringstring.ascii_letters#输出所有的大小写字母string.digits#输出所有(0-9)的数字string.ascii_letters#输出大小写的英文字母string.ascii_lowercase#输出小写英文字母string.ascii_uppercase#输出小写英文字母 10)格式化字符串 #format(修饰符及说明符同c语言)"{na...
```# Python script to generate random textimport randomimport stringdef generate_random_text(length):letters = string.ascii_letters + string.digits + string.punctuationrandom_text = ''.join(random.choice(letters) for i in range(le...
This way, you guarantee that you have a reference to the string length to use in further operations.Bitwise Operators and Expressions in Python Bitwise operators treat operands as sequences of binary digits and operate on them bit by bit. Currently, Python supports the following bitwise operators...