So I've been looking at this for quite some time and can't figure this problem out.
The goal here is to have it display realtime results line by line from the cmd/ terminal into the tkinter ScrolledText/Text widget, which it does except when ran through the cmd on Windows.
I am running the code on both Linux (Kali) and Windows 10. If I run it using Pycharm on Windows 10 then it will run smoothly and the GUI won't freeze waiting for the code run using Pexpect.
If I run the code through the cmd (python tmp_stack.py) then it will freeze the GUI until Pexpect finishes running the file I asked it to.
On Linux terminal the code runs fine and doesn't freeze (after adjusting it for Linux).
I combined multiple files into tmp_stack.py to prevent the need to create more files for no real reason.
I have tested that the configuration runs the same on both Windows and Linux.
Side note: I don't mind changing to subprocess.Popen and I don't mind using threading if it won't complain about main loop and will work.
requirements.txt - pexpect==4.6.0
op.py:
import time
print('This is op.py')
for i in range(10):
time.sleep(1)
print(i)
oscheck.py:
import platform
MYPLATFORM = platform.system()
tmp_stack.py:
from tkinter import *
from tkinter.ttk import *
from tkinter.scrolledtext import ScrolledText
import oscheck
if oscheck.MYPLATFORM == 'Windows':
from pexpect import popen_spawn
elif oscheck.MYPLATFORM == 'Linux':
from pexpect import spawn
class TextFrame(Frame):
def __init__(self, master=None, **kwargs):
super().__init__(master, **kwargs)
self.textarea = ScrolledText(master=self, wrap=WORD, bg='black', fg='white')
self.textarea.pack(side=TOP, fill=BOTH, expand=True)
def insert(self, text):
self.textarea['state'] = 'normal'
# Insert at the end of the TextArea.
self.textarea.insert(END, text)
self.textarea['state'] = 'disabled'
self.update()
class TheFrame(TextFrame):
def __init__(self, master=None, **kwargs):
super().__init__(master, **kwargs)
self.btn = Button(master=self, text="Run op", command=self.run_op)
self.btn.pack(fill=X)
# Ignore first child of pexpect on Linux because it is the bin bash prefix.
self.linux_flag = True
def run_op(self):
filename = 'op.py'
cmd = ['python', filename]
self.cmdstdout = RunCommand(cmd)
# Get root.
root_name = self._nametowidget(self.winfo_parent()).winfo_parent()
root = self._nametowidget(root_name)
root.after(0, self.updateLines())
def updateLines(self):
for line in self.cmdstdout.get_child():
if oscheck.MYPLATFORM == 'Linux' and self.linux_flag:
self.linux_flag = False
continue
try:
self.insert(line.decode('utf-8'))
except TclError as e:
print("Window has been closed.\n", e)
self.close()
break
def close(self):
self.cmdstdout.close()
class RunCommand:
def __init__(self, command):
command = ' '.join(command)
if oscheck.MYPLATFORM == 'Windows':
print('You are on Windows.')
self.child = popen_spawn.PopenSpawn(command, timeout=None)
elif oscheck.MYPLATFORM == 'Linux':
print('You are on Linux.')
self.child = spawn("/bin/bash", timeout=None)
self.child.sendline(command)
else:
print('Not Linux or Windows, probably Mac')
self.child = spawn(command, timeout=None)
def get_child(self):
return self.child
def close(self):
if oscheck.MYPLATFORM == 'Linux':
self.child.terminate(True)
def on_close(root):
root.quit()
root.destroy()
root = Tk()
if oscheck.MYPLATFORM == 'Windows':
root.state('zoomed')
elif oscheck.MYPLATFORM == 'Linux':
root.attributes('-zoomed', True)
the_frame = TheFrame(root, padding="1")
the_frame.grid(column=0, row=0, sticky=N+W+S+E)
root.protocol("WM_DELETE_WINDOW", lambda: on_close(root))
mainloop()
