Hi - I posted this question to Stack Overflow
(https://stackoverflow.com/questions/68042440/subprocess-not-working-after-onefile-pyinstaller-even-with-stdout-stdin-defined),
but haven't had a response, so thought I'd try here. Apologies if this is
not the right forum.
I have a tkinter GUI with a text box and run button. Pressing the run
button turns it to yellow and starts a subroutine that prints a few
numbers. Text output from the subroutine is redirected to the GUI text box.
However, after creating a standalone executable file with pyinstaller, it
no longer works. Pressing the run button doesn't seem to start the
subprocess. It does turn yellow, but no text appears in the text box and it
seems to start another instance of the main program - a second GUI appears
after about 10 seconds which is how long it takes for the initial GUI to
appear. The run button stays yellow on the initial GUI.
I've seen a bit online about other people having issues with subprocesses
not running after pyinstaller, but most of the solutions seem to be to make
sure stdout, stdin are set to subprocess.PIPE which I have, so I'm at a bit
of a loss what to try next.
When running the resulting executable from Anaconda prompt, I also get no
error messages or anything useful to help debug.
I'm creating my standalone with this:
pyinstaller --onefile --add-data "testsubprocess.py;." simpleGUI.py
I've also tried without --add-data "testsubprocess.py;.", making sure my
executable and testsubprocess.py are in the same folder.
My subprocess file, testsubprocess.py is:
import time
for i in range(3):
print("%d.%d" % divmod(i, 10))
time.sleep(0.5)
My main GUI file, simpleGUI.py, is:
import sys
import subprocess
from threading import Thread
import tkinter as tk
from queue import Queue, Empty
def iter_except(function, exception):
try:
while True:
yield function()
except exception:
return
class DisplaySubprocessOutputDemo:
def __init__(self, root):
self.root = root
width=600
height=350
xloc=0
yloc=10
self.root.geometry('%dx%d+%d+%d' % (width, height, xloc, yloc))
self.statustext = tk.Text(self.root, height=4, width=30)
self.statustext.grid(row=3, column=1)
self.startbutton = tk.Button(self.root, text = 'Start',
command=self.startprocess, bg='green', activebackground = 'orange')
self.startbutton.config(height = 2, width = 15)
self.startbutton.grid(row = 5, column=0,sticky='E')
self.startbuttonpresses = 0
exitbutton = tk.Button(self.root, text = 'Exit', command=self.quit,
bg='red')
exitbutton.config(height = 2, width = 15)
exitbutton.grid(row = 5, column=4, sticky='E')
def startprocess(self):
self.startbuttonpresses = self.startbuttonpresses+1
if self.startbuttonpresses == 1:
self.startbutton.configure(bg='yellow')
self.startbutton.configure(text='Stop')
self.process = subprocess.Popen([sys.executable, "-u",
"testsubprocess.py"], shell=True, stdout=subprocess.PIPE,
stdin=subprocess.PIPE, stderr=subprocess.STDOUT)
q = Queue(maxsize=1024)
t = Thread(target=self.reader_thread, args=[q])
t.daemon = True
t.start()
self.updatetext(q)
else:
self.startbuttonpresses = 0
self.process.kill()
self.startbutton.configure(bg='green')
self.startbutton.configure(text='Start')
def reader_thread(self, q):
try:
with self.process.stdout as pipe:
for line in iter(pipe.readline, b''):
q.put(line)
finally:
q.put(None)
def updatetext(self, q):
for line in iter_except(q.get_nowait, Empty): # display all content
if line is None:
self.startbuttonpresses = 0
self.startbutton.configure(bg='green')
self.startbutton.configure(text='Start')
return
else:
self.statustext.insert(tk.END, line)
self.root.after(400, self.updatetext, q)
def quit(self):
try:
self.process.kill()
except Exception:
pass
self.root.destroy()
root = tk.Tk()
app = DisplaySubprocessOutputDemo(root)
root.protocol("WM_DELETE_WINDOW", app.quit)
root.eval('tk::PlaceWindow %s center' %
root.winfo_pathname(root.winfo_id()))
root.mainloop()
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