Get Your Code:Click here to download the free sample codethat you’ll use to check if a string contains a substring. Take the Quiz:Test your knowledge with our interactive “How to Check if a Python String Contains a Substring” quiz. You’ll receive a score upon completion to help you...
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: sentence = "The quick brown fox jumps over ...
Hello, and welcome to this course on how to check if a Python string contains a substring. So if you’re working with text data in Python, then you might have run into a situation where you just need to confirm whether there is a certain substring…
Check if Python String Contains Substring Let’s look at another example where we will ask the user to enter both the strings and check if the first string contains the second string or substring or not. input_str1 = input('Please enter first input string\n') input_str2 = input('Please...
Check if Python StringContains SubstringUsing in operator The ‘in’ operator function in Python can check if a Python string contains a substring. This is the easiest way. It returns a boolean value, like true or false. Example: originalString = "pythonknowledge" ...
def check_substrings(string): substrings = [] for i in range(len(string)): for j in range(i+1, len(string)+1): substrings.append(string[i:j]) for substring in substrings: if substring not in string: return False return True 接下来,我们可以调用这个函数来检查一个字符串中是...
join(<coll_of_strings>) # Joins elements using string as a separator. <bool> = in <str> # Checks if string contains the substring. <bool> = <str>.startswith() # Pass tuple of strings for multiple options. <int> = <str>.find() # Returns start index of the first match or -...
join(<coll_of_strings>) # Joins elements using string as separator. <bool> = in <str> # Checks if string contains a substring. <bool> = <str>.startswith() # Pass tuple of strings for multiple options. <bool> = <str>.endswith() # Pass tuple of strings for multiple options. <i...
ValueError: substring not found >>> str.index("n") #同find类似,返回第一次匹配的索引值 4 >>> str.rindex("n") #返回最后一次匹配的索引值 11 >>> str.count('a') #字符串中匹配的次数 0 >>> str.count('n') #同上 2 >>> str.replace('EAR','ear') #匹配替换 'string learn' >...
1.__contains__()判断是否包含 判断指定字符或字符串是否包含在一个字符串内,返回值为true或者false str1="asdfgh" print(str1.__contains__('a')) print(str1.__contains__("df")) print(str1.__contains__('r')) 1. 2. 3. 4.