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: 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") 1. 2. 3. ...
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...
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 ...
STRING { string_id INT contents VARCHAR } SUBSTRING { substring_id INT contents VARCHAR } STRING ||--|| SUBSTRING 在关系图中,STRING表表示字符串,包含string_id和contents字段;SUBSTRING表表示子串,包含substring_id和contents字段;STRING和SUBSTRING之间存在一对一的关系。
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...
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....
stringexample="Terminator"substring="ter"ifsubstringinstringexample:print("We've found the string!")else:print("Oops, not found!") 1. 2. 3. 4. 5. 6. 运行结果将会是打印如下内容: 复制 We've found the string! 1. 方法2:使用 find 方法 ...
登录后复制stringexample ="Terminator"substring ="ter"ifsubstringinstringexample:print("We've found the string!")else:print("Oops, not found!") 运行结果将会是打印如下内容: 登录后复制We've found the string! 方法2:使用 find 方法 除了in 以外,还可以使用 find 方法来检查字符串包含问题。看下面的...