选择脚本的输出文件夹后无法关闭Tkinter窗口

Question

I have a function like this:

def ask_open_directory():
    root = Tk()
    # Prevent an actual interface from showing. We just want the file selection window
    root.withdraw()
    # Set focus on the window. This only works on MacOS
    os.system('''/usr/bin/osascript -e 'tell app "Finder" to set frontmost of process "Python" to true' ''')
    # Open selector
    dirpath = tkinter.filedialog.askdirectory()

    # Doesn't do anything
    root.destroy()

    return dirpath

which is called first to select an input directory, and closes just fine, and then again right after, to select an output directory.

The script takes a couple of minutes to churn through all the data, and all the while, the Tkinter window for selecting output directory stays frozen until the script completes.

Eg my script is organized like

def massive_function():
    input = custom_reader_function(input_location = ask_open_directory())
    output = ask_open_directory()

    lots of stuff happening
    finish

What am I missing?

Answer 1

What you are trying to achieve does not justify more than on Tkinter.Tk() instance.

I mean, you should remove root = Tk() , root.withdraw() and root.destroy() from your function. You should instantiate Tkinter.Tk() in your main program, not within individual functions.