I’m putting the finishing touches on a side project at work that requires opening a file as an argument at the command line, or through a file open dialog box. Here’s a snippet that demonstrates how I implemented it.
import sys import os def choose_file(): try: import Tkinter, tkFileDialog except ImportError: print "Tkinter not installed." exit() #Suppress the Tkinter root window tkroot = Tkinter.Tk() tkroot.withdraw() return str(tkFileDialog.askopenfilename()) if __name__ == "__main__": #If no file is passed at the command line, or if the file #passed can not be found, open a file chooser window. if len(sys.argv) < 2: filename = os.path.abspath(choose_file()) else: filename = os.path.abspath(sys.argv) if not os.path.isfile(filename): filename = choose_file() #Now you have a valid file in filename
It’s pretty straightforward. If no file is passed at the command line, or if the file passed at the command line isn’t a legitimate file, a file chooser dialog box pops up. If Tkinter isn’t installed, it bails out with an error message.
The bit about suppressing the Tk root window prevents a small box from appearing alongside the file chooser dialog box.