sub- substring to be searched in the stringstr. startandend(optional) - substring is searched withinstr[start:end] 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, i...
Python index()方法 Python 字符串 描述 Python index() 方法检测字符串中是否包含子字符串 str ,如果指定 beg(开始) 和 end(结束) 范围,则检查是否包含在指定范围内,该方法与 python find()方法一样,只不过如果str不在 string中会报一个异常。 语法 index()方法
string = "Python" print(string[0]) 1. 2. 此时我们可以发现,输出的是P,所以我们要注意,Python的字符串索引是从0开始的 范围报错 我突然有了新想法,如果输入索引数超过字符串个数会怎么样? string = "Python" print(string[6]) 1. 2. 此时,他报错了 IndexError: string index out of range #索引错误...
if last_occurrence == -1: print(f"Character '{char}' not found in the string.") else: print(f"Last occurrence of '{char}' is at index:", last_occurrence) # 输出: # Last occurrence of 'o' is at index: 27 # Last occurrence of 'l' is at index: 10 # Character 'z' not fou...
--- 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...
python string有indexof吗 Python中的字符串处理方法详解 在Python中,字符串是一种常见的数据类型,用于存储文本信息。在处理字符串时,我们经常会遇到需要查找字符串中某个子串的位置的情况。在一些其他编程语言中,通常会使用indexof或者find等方法来实现这个功能。那么在Python中,是否也有类似的方法呢?接下来我们就来一...
string.index(value, start, end) Parameter Values ParameterDescription valueRequired. The value to search for startOptional. Where to start the search. Default is 0 endOptional. Where to end the search. Default is to the end of the string ...
string.index(str, beg=0, end=len(string))跟find()方法一样,只不过如果str不在 string中会报一个异常. 代码语言:javascript 代码运行次数:0 运行 AI代码解释 >>>mystr.index("how")12>>>mystr.index("how",20,30)Traceback(most recent call last):File"<stdin>",line1,in<module>ValueError:subst...
var1 = "Hello World" print(var1[11]) 运行报错如下: IndexError: string index out of range 如果取多个字符时,索引超出字符串索引则能取得到值 var1 = "Hello World" print(var1[0:13]) print(var1[-13:]) print(var1[-14::2]) 运行结果: Hello World Hello World HloWrd 运行截图: 字符...
If tabsize is not given, a tab size of 8 characters is assumed. """ pass def find(self, sub, start=None, end=None): # real signature unknown; restored from __doc__ """ S.find(sub[, start[, end]]) -> int Return the lowest index in S where substring sub is found, ...