Tkinter NameError only when running script from shell

Question

I've got a Tkinter Python program, a reduced version of which can be found below:

from tkinter import *
from tkinter.ttk import *

filedialog.askopenfilename()

When I run this script from IDLE, I do not get any errors.

However, when run from PowerShell, using python myscript.py I get

NameError: could not find name 'filedialog'

Windows 10 x64 on a mid-2012 MacBook Pro

My answer here: stackoverflow.com/questions/38806673/… described how to fix existing IDLE releases so they give the proper error. — Terry Jan Reedy
– Terry Jan Reedy, Commented Aug 6, 2016 at 20:48

Feneric · Accepted Answer · 2016-07-09 00:54:02Z

1

IDLE is probably importing it already, but in general since filedialog is a tkinter module it won't get imported with the bare:

from tkinter import *

Include an extra:

from tkinter import filedialog

and you should be good to go.

answered Jul 9, 2016 at 0:54

Feneric

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4 Comments

JPeroutek Over a year ago

Why would the filedialog module not be included in the *?

Feneric Over a year ago

Same as ttk (that you're already including separately), it's a module.

Terry Jan Reedy Over a year ago

This is a known IDLE bug in idlelib.run. bugs.python.org/issue25507 The solution in all cases is to add the missing import, as Feneric said. I hope to do the needed refactoring before 3.6, but must add tests first to avoid introducing new, and perhaps worse, bugs.

Terry Jan Reedy Over a year ago

The Q&A persuaded me to finish the issue. Starting with 3.5.3 and 3.6.0a4, "from tkinter import *; filedialog' will raise the appropriate NameError when run by IDLE.

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