下面是一个更完整的示例,演示如何在一个长字符串中查找多个子字符串,并获取它们的位置。 deffind_substrings(string,substrings):positions=[]forsubstringinsubstrings:index=string.find(substring)positions.append(index)returnpositions# 示例用法string="This is a test string."substrings=["is","test","strin...
index() Return Value If substring exists inside the string, it returns the lowest index in the string where substring is found. If substring doesn't exist inside the string, it raises aValueErrorexception. Theindex()method is similar to thefind()method for strings. The only difference is that...
--- IndexError Traceback (most recent call last) <ipython-input-70-e894f93573ea> in <module> ---> 1 word[42] # The word only has 6 characters. IndexError: string index out of range 但在范围内,太大的索引值会默认为字符串的大小,不会导致错误。 如果你总是希望在特定索引处开始切片...
注意事项: 在进行字符串截取时,如果指定的索引不存在,就会抛出异常IndexError: string index out of range:超出字符串索引范围 这时我们可以使用try...except语句去捕获异常(关于异常处理的讲解后面的文章里会讲到) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 demo="但行好事莫问前程!"try:res1=demo[10...
4.1 class string.Template(template) 4.1.1 高级用法 4.1.2 其他 5. 帮助函数 string.capwords(s,sep=None) 源代码:Lib/string.py 也可以看看 str类型及方法 1. 字符串常量 源码定义如下: whitespace = ' \t\n\r\v\f' ascii_lowercase = 'abcdefghijklmnopqrstuvwxyz' ...
Python提供index函数,检查字符串是否包含子字符串,通常表现为特定字符、特定字符。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 str1="Hello.python";str2=".";print str1.index(str2);#结果5print str1.index(str2,2);#结果5print str1.index(str2,10);#结果报错,没找到子字符串 ...
A string is printable if all of its characters are considered printable in repr() or if it is empty. """ pass def isspace(self, *args, **kwargs): # real signature unknown """ Return True if the string is a whitespace string, False otherwise. ...
string.partition(",") #字符串str中不存在sep",",返回了两个空字符串。 ('https://www.google.com.hk/', '', '') string.partition(".") #字符串str中存在两个"." 但索引到www后的"." 停止索引。 ('https://www', '.', 'google.com.hk/') ...
Find character indices in string.Write a Python program to print the index of a character in a string.Sample Solution:Python Code:# Define a string 'str1'. str1 = "w3resource" # Iterate through the characters of the string using enumeration. # 'index' contains the position of the ...