That’s nice and considerate of the Python devs, but a lot of software keeps running indefinitely. When your program exits, all resources are freed up automatically. This doesn’t have to be a problem though.
If you do this often enough, you might run into problems, because there’s a limit to the number of open files a regular operating system user can have. If you don’t, you create a so-called resource leak. If the file was successfully opened, it returns a file object that you can use to read from and write to that file.Īs soon as you open a file with Python, you are using system resources that you need to free once you’re done. The open() function expects at least one argument: the file name.
It’s part of Python’s built-in functions, you don’t need to import anything to use open(). In Python, we open a file with the open() function.
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