ImportError: No module named FileDialog - after PyInstaller

Question

I have written a program that I have tried to turn into an executable using PyInstaller. Pyinstaller appears to have finished without any errors and I end up with an application in /dist/my_program. However, when I try to run that application a console window flashes up for a second with a traceback:

Edit: I have copied the traceback out. There may be a mistake as I had to type it up from a screenshot because it only flashes up.

Traceback (most recent call last):
File "<string>", line 14, in <module>
File "C:\Users\user\desktop\PyInstaller-2.1\PyInstaller\loader\pyi_importers.py", line 270, in load_module
exec(bytecode, module.__dict__)
File "C:\Users\user\desktop\PyInstaller-2.1\my_program\build\my_program\out00-PYZ.pyz\matplotlib.pyplot", line 108, in <module>
File "C:\Users\user\desktop\PyInstaller-2.1\my_program\build\my_program\out00-PYZ.pyz\matplotlib.backends", line 32, in pylab_setup
File "C:\Users\user\desktop\PyInstaller-2.1\PyInstaller\loader\pyi_importers.py", line 270, in load_module
exec(bytecode, module.__dict__)
File "C:\Users\user\desktop\PyInstaller-2.1\my_program\build\my_program\out00-PYZ.pyz\matplotlib.backends.backend_tkagg", line 7, in <module>
File "C:\Users\user\desktop\PyInstaller-2.1\my_program\build\my_program\out00-PYZ.pyz\six", line 194, in load_module
File "C:\Users\user\desktop\PyInstaller-2.1\my_program\build\my_program\out00-PYZ.pyz\six", line 108, in _resolve
File "C:\Users\user\desktop\PyInstaller-2.1\my_program\build\my_program\out00-PYZ.pyz\six", line 779, in _import_module
ImportError: No module named FileDialog

Below are the imports that I have in my code:

import Tkinter
from tkFileDialog import askopenfilename
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.mlab as mlab
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
import subprocess
from PIL import Image, ImageTk
import os

Does anyone know whats causing this/what the fix is? I presume the error is the importation of tkFileDialog?

Edit2: the program runs fine when I run it in my interpreter (Spyder) but when I packaged it using PyInstaller the resulting application gives this error.

Solution

According to this question adding import FileDialog solves the problem. Matplotlib seems to need this.
However, I've used Pyinstaller on a script of mine also importing matplotlib and it gives no such error. So I don't know what exacly is the problem here.

Comments

[rafaelvalle]

fhdrsdg, In your script, did you use FileDialog or tkFileDialog? If you have not, this might have been the reason why you had no such error.

[Ber]

@rafaelvalle This may also be achieved by adding hiddenimports=['FileDialog',], in th .spec file's Analysis() section.