How to Fix the \'PermissionError: [Errno 13] Permission denied\' When Downloading Files in Python?

Permission Denied: Solving the "Errno 13" Error in Python File Handling

When working with files in Python, you may encounter the "PermissionError: [Errno 13] Permission denied" exception. This occurs when you attempt to access or modify a file that your current user account lacks the necessary permissions for.

In the specific case you described, you are trying to download a file using the open() function, but receiving a "PermissionError." This is because you are providing the function with a file path that is a folder, rather than a specific file.

To resolve this issue, you need to ensure that the place_to_save variable points to a valid file path. You can do this by using the isfile() function to verify that the path refers to a file, rather than a folder.

Here's an updated version of your code that includes the necessary checks:

import os

def download():
    # get selected line index
    index = films_list.curselection()[0]
    # get the line's text
    selected_text = films_list.get(index)
    directory = filedialog.askdirectory(parent=root, 
                                        title="Choose where to save your movie")
    place_to_save = directory + '/' + selected_text
    
    # Verify that the path points to a file
    if not os.path.isfile(place_to_save):
        raise PermissionError("Permission denied: {}".format(place_to_save))
    
    with open(place_to_save, 'wb') as file:
        connect.retrbinary('RETR ' + selected_text, file.write)
    tk.messagebox.showwarning('File downloaded', 
                              'Your movie has been successfully downloaded!' 
                              '\nAnd saved where you asked us to save it!!')

By adding this check, you can prevent the "PermissionError" from occurring by ensuring that you are always working with valid file paths.

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