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How to Check if a String Ends with a File Extension in Python
This code checks whether a filename ends with any of a list of file extensions, handling case insensitivity.
def ends_with_extension(filename, extensions):
"""Check if a filename ends with any of the given extensions."""
lower_name = filename.lower()
return any(lower_name.endswith(ext.lower()) for ext in extensions)
if __name__ == "__main__":
# Test cases
test_files = ["report.pdf", "image.PNG", "script.…How to Check if a String Starts With a Prefix Case-Insensitively in Python
This code defines a function that checks if a string starts with a given prefix, ignoring case, using the lower() method.
def starts_with_case_insensitive(text, prefix):
"""Check if a string starts with a given prefix, ignoring case."""
return text.lower().startswith(prefix.lower())
if __name__ == "__main__":
test_strings = [
("Hello World", "hello"),
("Python Programming", "PYTHON"),
("Data Science"…Text Processor Functions for Beginners in Python
Demonstrates simple text-processing utilities: word counting, word reversal, whitespace normalization, and lowercase conversion using basic string methods.
def count_words(text):
"""Return the number of words in a string."""
return len(text.split())
def reverse_words(text):
"""Return the text with words in reverse order."""
return ' '.join(text.split()[::-1])
def remove_extra_spaces(text):
"""Return text with extra whitespace collapsed to a single s…Browse by section
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Guide: free Python code samples library
Copy-ready Python snippets for learners and developers
PythonSkillset code samples are short, focused examples organised by topic and difficulty. Every snippet is server-rendered HTML — readable by search engines and easy to copy. Open any sample, read the notes, copy the code, then press Try in editor to run it in the browser with Pyodide.
How to use this library
- Pick a topic section — strings, lists, files, functions, and more
- Open a sample, read How it works, and copy the code block
- Run it in the IDE, tweak values, then take a related quiz or tutorial lesson
Samples vs tutorials and challenges
Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.