def find_substring_in(s, sub):""" 使用in关键字查找子字符串 """if sub in s:return Trueelse:return False# 定义一个字符串string = 'A New String Hello, World!'sub_string = "Hello"print('例1，源字符串为：', string, ' 待查找字符串为：', sub_string)print('子字符串是否包含：...
string = "Hello, World!" substring = "lo" if substring in string: index = string.find(substring) print(f"Substring found at index {index}") else: print("Substring not found") 复制代码 输出结果: Substring found at index 3 复制代码 在上述示例中,我们使用in关键字检查子字符串是否存在于字符...
string.find(substring,start,end) 1. 其中,substring是要查找的子字符串,start和end是可选参数,用于指定查找的起始位置和结束位置。 下面是一个示例代码: AI检测代码解析 string="Hello, World!"index=string.find("Hello")ifindex!=-1:print("子字符串存在,起始位置为",index)else:print("子字符串不存在")...
string ='Hello World, this is a string' # substring substring ='this' ifsubstringinstring: print('Found the substring!') else: print('Could not find the substring.') 使用index() 方法 Python String类有一个 index() 方法,如果在字符串中找到目标子字符串,它将返回子字符串的索引。当你需要知道...
if substring in string: print("包含子串") else: print("不包含子串") ``` 2. 查找字符串中某个子串的位置: ```python string = "hello world" substring = "world" index = string.find(substring) if index != -1: print("子串在字符串中的位置为:", index) ...
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() function as shown in the example ...
Python String find() The find() method returns the lowest index of the substring if it is found in given string. If its is not found then it returns -1. Syntax : str.find(sub,start,end) Parameters : sub :It’s the substring which needs to be searched in the given string....
'finding words in a paragraph. It can give '\'values as to where the word is located with the '\'different examples as stated'find_the_word=re.finditer('as',text)formatchinfind_the_word:print('start {}, end {}, search string \'{}\''.format(match.start(),match.end(),match....
# substring substring = 'this' if substring in string: print('Found the substring!') else: print('Could not find the substring.') 使用index() 方法 Python String类有一个 index() 方法,如果在字符串中找到目标子字符串,它将返回子字符串的索引。当你需要知道子字符串的位置时,这很有用。以下是如...
要判断一个字符串是否包含另一个字符串,你可以使用 Python 中的 in 关键字或者字符串的 find() 方法。下面是两种判断 字符串包含 的方法示例: 方法一:使用 in 关键字进行判断 string = "Hello, World!" # 使用 `in` 关键字判断是否包含某字符串 if "World" in string: print("包含") else: print("不...