How can I create a directory if it does not exist?

What is the most elegant way to check if the directory a file is going to be written to exists, and if not, create the directory using Python? Here is what I tried:

Somehow, I missed os.path.exists (thanks kanja, […]

How can I create a directory if it does not exist?

What is the most elegant way to check if the directory a file is going to be written to exists, and if not, create the directory using Python? Here is what I tried:

Somehow, I missed os.path.exists (thanks kanja, […]

Difference between append vs. extend list methods in Python

What’s the difference between the list methods append() and extend()? append: Appends object at end.

gives you: [1, 2, 3, [4, 5]] extend: Extends list by appending elements from the iterable.

gives you: [1, 2, 3, 4, 5] […]

What does if __name__ == “__main__”: do?

What does the if __name__ == “__main__”: do?

When the Python interpreter reads a source file, it executes all of the code found in it. Before executing the code, it will define a few special variables. For example, if […]

How to merge two dictionaries in a single expression?

I have two Python dictionaries, and I want to write a single expression that returns these two dictionaries, merged. The update() method would be what I need, if it returned its result instead of modifying a dict in-place.

How […]

Calling an external command in Python

How can I call an external command (as if I’d typed it at the Unix shell or Windows command prompt) from within a Python script? Look at the subprocess module in the standard library:

The advantage of subprocess vs […]