Create a simple dialog in Tkinter (python)

To create a dialog in Python using Tkinter module, just inherit from simpledialog.Dialog class from tkinter.simpledialog module (Python 3).

from tkinter import *

from tkinter import simpledialog

import sys, os

class SettingDialog(simpledialog.Dialog):

def body(self, master):

Label(master, text="First").grid(row=0, sticky=W)

root = Tk()

#Without "default" keyword, only root (parent) window icon is changed

#other child dialogs still use Tk icon

root.iconbitmap(default='AC.ico')

#call withdraw() to remove parent window, only show the child dialog.

root.withdraw()

SettingDialog(root, "hello")

cx_Freeze and Python executable

To make the executable created by cx_Freeze on Python code works on other computers, you have to copy the following files to the executable directory:

• C:\WINDOWS\WinSxS\Manifests\x86_Microsoft.VC90.CRT_1fc8b3b9a1e18e3b_9.0.21022. 8_x-ww_d08d0375.manifest
• C:\WINDOWS\WinSxS\x86_Microsoft.VC90.CRT_1fc8b3b9a1e18e3b_9.0.21022 .8_x-ww_d08d0375\
  msvcm90.dll
  msvcp90.dll
  msvcr90.dll

You can download these files from Microsoft Visual C++ 2008 Redistributable Package (x86) (11/29/2007)

Create Single Instance Python Application in Windows

Source by Dragan Jovelic.

from win32event import CreateMutex

from win32api import CloseHandle, GetLastError

from winerror import ERROR_ALREADY_EXISTS

class singleinstance:

""" Limits application to single instance """

def __init__(self):

self.mutexname = "testmutex_{D0E858DF-985E-4907-B7FB-8D732C3FC3B9}"

self.mutex = CreateMutex(None, False, self.mutexname)

self.lasterror = GetLastError()

def aleradyrunning(self):

return (self.lasterror == ERROR_ALREADY_EXISTS)

def __del__(self):

if self.mutex:

CloseHandle(self.mutex)

#---------------------------------------------#

# sample usage:

#

from singleinstance import singleinstance

from sys import exit

# do this at beginnig of your application

myapp = singleinstance()

# check is another instance of same program running

if myapp.aleradyrunning():

print "Another instance of this program is already running"

exit(0)

# not running, safe to continue...

print "No another instance is running, can continue here"