Tutorials

Python string endswith() Method

Posted in Python Tutorial

Updated on Oct 31, 2024

By Mari Selvan

👁️ 131 - 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

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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

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# 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

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

URL Validation:

url-validation.py

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

Checking File Extensions:

checking-file-extensions.py

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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!