Tutorials

Python string endswith() Method

Posted in Python Tutorial

Updated on Nov 22, 2024

By Mari Selvan

140 - Views

4 mins

1 Comment

Photo Credit to CodeToFun

Introduction

In Python, working with strings involves a variety of methods that provide useful functionalities. One such method is endswith(), which is used to determine whether a string ends with a specified suffix.

This method is valuable when you need to perform conditional checks on the endings of strings.

Understanding the endswith() Method

The endswith() method is a built-in string method in Python that returns True if a string ends with a specified suffix and False otherwise. It is a powerful tool for string manipulation and conditional logic.

Syntax

The syntax for the endswith() method is:

Syntax

Copied

string.endswith(suffix[, start[, end]])

string: The original string.
suffix: The suffix to check for at the end of the string.
start (optional): The starting index for the search.
end (optional): The ending index for the search.

Example

Let's explore a simple example to understand how the endswith() method works:

endswith.py

Copied

# Using endswith() method
file_name = "document.txt"
is_text_file = file_name.endswith(".txt")

# Displaying the result
print(f"The file {file_name} is a text file: {is_text_file}")

Testing the Program

Output

The file document.txt is a text file: True

How the Program Works

In this example, the endswith() method checks if the string "document.txt" ends with the suffix ".txt," and the result is True.

Common Use Cases

File Type Verification:

file-type-verification.py

Copied

file_name = "image.jpg"
is_image_file = file_name.endswith((".jpg", ".jpeg", ".png"))

URL Validation:

url-validation.py

Copied

url = "https://example.com"
is_https = url.endswith("s")

Checking File Extensions:

checking-file-extensions.py

Copied

file_path = "/path/to/file/document.pdf"
is_pdf = file_path.endswith(".pdf")

Notes

The endswith() method is case-sensitive, so be mindful of the case when specifying the suffix.
If you need a case-insensitive check, consider converting both the string and suffix to lowercase using the lower() method before using endswith().

Optimization

While the endswith() method is efficient for simple suffix checks, if you need more complex pattern matching, regular expressions (re module) might be a more suitable option.

Conclusion

The endswith() method is a versatile tool for checking the endings of strings, offering a convenient way to perform conditional checks in Python. Whether you're validating file types, URLs, or specific patterns, this method provides a straightforward solution.

Feel free to incorporate and modify the code examples for your specific use case. Happy coding!