Why isn't mmap closing associated file (getting PermissionError: [WinError 32])?

When using mmap in Python, it doesn't close the associated file automatically. You need to close the mmap object explicitly using its close() method. If you don't close the mmap object before closing the associated file, you might encounter the PermissionError: [WinError 32] error.

Here's an example of how to properly use mmap and close the associated file:

pythonCopy code
import mmap



# Open the file in read mode

with open('your_file.txt', 'r') as file:

    # Create an mmap object

    mmapped_file = mmap.mmap(file.fileno(), 0, access=mmap.ACCESS_READ)



    # Do your operations with the mmapped_file



# Close the mmap object

mmapped_file.close()

In this example, the with statement ensures that the mmap object is properly closed when you exit the block, even if an exception is raised.

Keep in mind that it's important to close the mmap object before closing the file it's associated with, as Windows requires the file to be closed before the mmap object can be closed without errors.