How to check if a string contains a substring in Python?
There are multiple ways to check if a string contains a specific substring.
Using in keyword
You can use in keyword to check if a string contains a specific substring. The expression will return boolean value.
if 'Stack' in 'BetterStack':
print('Found it!')
else:
print('Did not found it!')
The general syntax is the following:
if substring in string:
# substring is in string
else
# substring is not in string
Using the String.index
You can also use String.index method to find specific the index in the string where the substring starts.
string = 'BetterStack'
substring = 'Stack'
try:
string.index(substring)
except ValueError:
print('Not found!')
else:
print('Found it!')
Using the String.find
Also, you can use the find function from the String class. This function will return -1 if the substring is not present in the string.
string = 'BetterStack'
substring = 'Stack'
if string.find(substring) != -1:
print('Found it!')
else:
print('Not found!')
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
-
Understanding slicing in Python?
Slicing is a way of extracting a specific part of an array. The syntax is following: mylist[start:end] # items start through end-1 mylist[start:] # items start through the rest of the array ...
Questions -
Difference between static and class methods in Python?
Class method To create a class method, use the @classmethod decorator. Class methods receive the class as an implicit first argument, just like an instance method receives the instance. The class m...
Questions -
How to flatten a list in Python?
You can flatten a list in python using the following one-liner: flat_list = [item for sublist in l for item in sublist] In the example above, l is the list of lists that is to be flattened. The pre...
Questions -
What does the "yield" keyword do in Python?
To better understand what yield does, you need first to understand what generator and iterable are. What is iterable When you use a list or list-like structure, you can read the values from the lis...
Questions
We are hiring.
Software is our way of making the world a tiny bit better. We build tools for the makers of tomorrow.
Help us in making the internet more reliable.
Help us with developer education and get paid.
