This guide explains pathlib.path.iterdir() method: usage and examples through a focused Python example. You will learn the behavior to expect, why it matters in a real program, and how to recognize the common mistakes before applying it in your own project.
What You Will Learn
Path.iterdir() yields immediate children of a directory as Path objects. It does not recursively descend into subdirectories, and it does not guarantee alphabetical ordering.
When and Why to Use It
The following example focuses on a practical use of pathlib.Path.iterdir() Method: Usage and Examples.
Step-by-Step Example
from pathlib import Path
from tempfile import TemporaryDirectory
with TemporaryDirectory() as directory:
parent_directory = Path(directory)
(parent_directory / "a.txt").write_text("A", encoding="utf-8")
(parent_directory / "b.txt").write_text("B", encoding="utf-8")
print(sorted(child.name for child in parent_directory.iterdir()))Understanding the Example
Sorting the child names gives a deterministic list of a.txt and b.txt. Without sorted, filesystem enumeration order is unspecified.
Expected Output
['a.txt', 'b.txt']Important Behavior and Edge Cases
Calling iterdir on a file or unreadable directory can raise OSError. For recursive iteration use walk or rglob.
Try It Yourself
List only immediate .txt files from a directory without descending into nested folders.
For file examples, use a dedicated practice directory or a temporary directory. Make sure you understand whether a call reads, creates, overwrites or appends before using it on important files.
Common Beginner Mistakes
- Calling iterdir on a file or unreadable directory can raise OSError. For recursive iteration use walk or rglob.
- Assuming the current working directory, encoding, filesystem contents or file permissions will be identical on every computer.
- Skipping the practice step and assuming the example covers every input. Test at least one normal case and one edge case relevant to this topic.
Key Takeaways
- Path.iterdir() yields immediate children of a directory as Path objects.
- Sorting the child names gives a deterministic list of a.txt and b.txt.
- Apply the technique deliberately, checking its documented input requirements and failure behavior before integrating it into a larger project.