string.contains(substring) 1. 其中,string是需要被检查的字符串,substring是要检查是否包含在string中的子字符串。如果substring在string中存在,则返回True,否则返回False。 代码示例 下面我们通过一个简单的示例来演示contains方法的用法: # 定义一个字符串string="Hello, Wo
string.contains(substring) 1. 其中,string是要检查的字符串,substring是要查找的子字符串。 contains函数将返回一个布尔值,表示是否找到了子字符串。如果找到了,返回True;如果没有找到,返回False。 使用contains进行匹配查询 下面的示例演示了如何使用contains函数进行匹配查询。 # 创建一个字符串string="Hello, World!
substring = "Hello" if string.contains(substring): print("字符串包含子字符串") else: print("字符串不包含子字符串") 复制代码 运行结果为: 字符串包含子字符串 复制代码 请注意,contains()方法在Python中并不存在。如果要检查一个字符串是否包含另一个字符串,可以使用in关键字。使用方法如下: substring i...
str1 = 'Hello world!你好' contains_substring = "Hello" in str1 no_contains_substring = "Hello111" in str1 print(contains_substring) #结果为:True print(no_contains_substring) #结果为:False 5.替换 使用.replace() 方法替换字符串中的子串。默认全部替换。如果不需要全部替换,可指定替换次数...
Here are the different methods which can be used to check if Python string contains substring: The in Operator: A simple, readable way to check if a python string contains another string. str.find() Method: Searches for a substring and returns the index of the first occurrence, or -1 if...
Another way to check if a string contains a substring in Python is by using thefind()method. It returns the index of the first occurrence of the substring within the string. If the substring is not found, it returns -1. Here’s an example: ...
Python can’t find the all-lowercase string "secret" in the provided text. Humans have a different approach to language than computers do. This is why you’ll often want to disregard capitalization when you check whether a string contains a substring in Python. You can generalize your ...
The python str class has a __contains__() method that will check if a python string contains a substring. It will return true if it’s found and will return false if it’s not. You will notice that the method name is wrapped in two underscores. This prevents this method from being ...
2. Usingfind()to check if a string contains another substring We can also usestring find() functionto check if string contains a substring or not. This function returns the first index position where substring is found, else returns -1. ...
contains方法返回一个布尔值,如果目标字符串出现在原始字符串中,则返回True,否则返回False。 下面是使用contains方法的示例代码: ```python string = "Hello, world!" substring = "world" if substring in string: print("Substring is present in the string.") else: print("Substring is not present in ...