How to check if a string contains a specific substring in Python?

To check if a string contains a specific substring in Python, you can use the in operator or the find() method. Here's an example of how to do it:

Using the in operator:

string = "This is a sample string"
substring = "sample"

if substring in string:
    print("Substring found!")
else:
    print("Substring not found.")

Using the find() method:

string = "This is a sample string"
substring = "sample"

if string.find(substring) != -1:
    print("Substring found!")
else:
    print("Substring not found.")

Both methods will return True if the substring is found in the string, and False otherwise.