You can use theinoperator, thefind()method, or regular expressions to check if a string contains a substring in Python. Theinoperator returnsTrueif the substring is found, while thefind()method returns the index
The in membership operator is the recommended way to check if a Python string contains a substring. Converting input text to lowercase generalizes substring checks by removing case sensitivity. The .count() method counts occurrences of a substring, while .index() finds the first occurrence’s ...
String contains Substring Since “World” is a substring of the original string, “Hello World!”, the return value is True and the if statement is executed. Example 2 Let’s try to check for the substring “world”. str = "Hello World!" sub_str = "world" if (str.__contains__(sub...
How to check if a string contains a substring No matter whether it’s just a word, a letter or a phrase that you want to check in a string, with Python you can easily utilize the built-in methods and the membership testinoperator. It is worth noting that you will get aboolean value(...
print(any(c.isalpha()forcinmy_string1))# Check if letters are contained in string# True As you can see, the logical value True has been returned, i.e. our first example string contains alphabetical letters. Let’s apply exactly the same Python syntax to our second string: ...
Using Python's "in" operator The most straightforward and efficient approach to check whether a string contains a substring in Python is to use the "in" operator. This operator evaluates to true if the substring is present in the string, otherwise, it returns false. str="Hello, World!" pr...
Check if a Python String Contains a Number Using the ord() Function In ASCII encoding, numbers are used to represent characters. Each character is assigned a specific number between 0 to 127 to it. We can find the ASCII value of any number in python using theord()function. ...
2. Use float() to Check String is a Floating Point Number Thefloat()function can be used to check if a string is a floating-point number in Python, actually, this method converts a string to a floating-point number however, we can use this to check string contains a float value. ...
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: ...
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 ...