"position=str.find("World")print("The position of 'World' is:",position) 1. 2. 3. 输出结果为: The position of 'World' is: 7 1. 我们可以看到,find()函数找到了子字符串"World"在原字符串中的位置,即第8个字符。 方法二:index()函数 与find()函数类似,字符串对象还有一个index()函数,用来...
message="Hello, World! Welcome to Python programming."substring="World"# 使用 str.find()position_find=message.find(substring)print(f"The position of '{substring}' using find():{position_find}")# 使用 str.index()try:position_index=message.index(substring)print(f"The position of '{substring}...
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...
find()回报-1 和index()加薪ValueError。使用 find()>>> myString = 'Position of a character'>>...
start,end=spanprint(start,end)#0,15substring=txt[start:end]print(substring)#Ilove to teach 如例上边例子中示,我们在目标字符串中查找是否有I love to teach的字符串匹配。其中从开始的位置我们找到了对应匹配,进而得到了一个对象的返回。 代码语言:javascript ...
>>> str = "C语言中文网">>> bytes = str.encode("GBK")>>> bytes.decode() #默认使用 UTF-8 编码,会抛出以下异常Traceback (most recent call last):File "<pyshell#10>", line 1, in<module>bytes.decode()UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd3 in position 1: invalid...
find('strong').text(); master_name = master_name.substring(4); if(master_name != 'root'){ $(".grid-item a").each(function(index, element) { $(this).attr('href','#'); }); }59、获取公众号关注url在微信网页版,打开公众号,点击右上角“…”,在弹框中选择右下角中间的“查看历史...
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, ...
ValueError: substring not found 解决办法: 对于不确定子字符串是否在被搜索字符串中存在,可以用find函数,如果不存在,它会返回-1. s = "hello, world" print(s.find("world!")) 35. ValueError: subsection not found 对于字节串,使用index来搜索子串,容易出现这个错误。
print("The position of Tutorials using index() : ", mystring.index("test")) ValueError: substring not found 在上面的示例中,我们试图找到子字符串“ test”的位置。 子字符串不存在于给定的字符串中,因此使用find()时,位置为-1,但是对于index(),它会引发如上所示的错误。