如何在Python中创建一个简单的消息框？

I’m looking for the same effect as alert() in JavaScript.

I wrote a simple web-based interpreter this afternoon using Twisted.web. You basically submit a block of Python code through a form, and the client comes and grabs it and executes it. I want to be able to make a simple popup message, without having to re-write a whole bunch of boilerplate wxPython or TkInter code every time (since the code gets submitted through a form and then disappears).

I’ve tried tkMessageBox:

import tkMessageBox
tkMessageBox.showinfo(title="Greetings", message="Hello World!")

but this opens another window in the background with a tk icon. I don’t want this. I was looking for some simple wxPython code but it always required setting up a class and entering an app loop etc. Is there no simple, catch-free way of making a message box in Python?

You could use an import and single line code like this:

import ctypes  # An included library with Python install.   
ctypes.windll.user32.MessageBoxW(0, "Your text", "Your title", 1)

Or define a function (Mbox) like so:

import ctypes  # An included library with Python install.
def Mbox(title, text, style):
    return ctypes.windll.user32.MessageBoxW(0, text, title, style)
Mbox('Your title', 'Your text', 1)

Note the styles are as follows:

##  Styles:
##  0 : OK
##  1 : OK | Cancel
##  2 : Abort | Retry | Ignore
##  3 : Yes | No | Cancel
##  4 : Yes | No
##  5 : Retry | Cancel 
##  6 : Cancel | Try Again | Continue

Have fun!

Note: edited to use MessageBoxW instead of MessageBoxA

Have you looked at easygui?

import easygui

easygui.msgbox("This is a message!", title="simple gui")

Also you can position the other window before withdrawing it so that you position your message

#!/usr/bin/env python

from Tkinter import *
import tkMessageBox

window = Tk()
window.wm_withdraw()

#message at x:200,y:200
window.geometry("1x1+200+200")#remember its .geometry("WidthxHeight(+or-)X(+or-)Y")
tkMessageBox.showerror(title="error",message="Error Message",parent=window)

#centre screen message
window.geometry("1x1+"+str(window.winfo_screenwidth()/2)+"+"+str(window.winfo_screenheight()/2))
tkMessageBox.showinfo(title="Greetings", message="Hello World!")

The code you presented is fine! You just need to explicitly create the “other window in the background” and hide it, with this code:

import Tkinter
window = Tkinter.Tk()
window.wm_withdraw()

Right before your messagebox.

The PyMsgBox module does exactly this. It has message box functions that follow the naming conventions of JavaScript: alert(), confirm(), prompt() and password() (which is prompt() but uses * when you type). These function calls block until the user clicks an OK/Cancel button. It’s a cross-platform, pure Python module with no dependencies.

Install with: pip install PyMsgBox

Sample usage:

import pymsgbox
pymsgbox.alert('This is an alert!', 'Title')
response = pymsgbox.prompt('What is your name?')

Full documentation at http://pymsgbox.readthedocs.org/en/latest/

In Windows, you can use ctypes with user32 library:

from ctypes import c_int, WINFUNCTYPE, windll
from ctypes.wintypes import HWND, LPCSTR, UINT
prototype = WINFUNCTYPE(c_int, HWND, LPCSTR, LPCSTR, UINT)
paramflags = (1, "hwnd", 0), (1, "text", "Hi"), (1, "caption", None), (1, "flags", 0)
MessageBox = prototype(("MessageBoxA", windll.user32), paramflags)

MessageBox()
MessageBox(text="Spam, spam, spam")
MessageBox(flags=2, text="foo bar")

On Mac, the python standard library has a module called EasyDialogs. There is also a (ctypes based) windows version at http://www.averdevelopment.com/python/EasyDialogs.html

If it matters to you: it uses native dialogs and doesn’t depend on Tkinter like the already mentioned easygui, but it might not have as much features.

import ctypes
ctypes.windll.user32.MessageBoxW(0, "Your text", "Your title", 1)

The last number (here 1) can be change to change window style (not only buttons!):

## Button styles:
# 0 : OK
# 1 : OK | Cancel
# 2 : Abort | Retry | Ignore
# 3 : Yes | No | Cancel
# 4 : Yes | No
# 5 : Retry | No 
# 6 : Cancel | Try Again | Continue

## To also change icon, add these values to previous number
# 16 Stop-sign icon
# 32 Question-mark icon
# 48 Exclamation-point icon
# 64 Information-sign icon consisting of an 'i' in a circle

For example,

ctypes.windll.user32.MessageBoxW(0, "That's an error", "Warning!", 16)

will give this:

Use

from tkinter.messagebox import *
Message([master], title="[title]", message="[message]")

The master window has to be created before. This is for Python 3. This is not fot wxPython, but for tkinter.

import sys
from tkinter import *
def mhello():
    pass
    return

mGui = Tk()
ment = StringVar()

mGui.geometry('450x450+500+300')
mGui.title('My youtube Tkinter')

mlabel = Label(mGui,text ='my label').pack()

mbutton = Button(mGui,text ='ok',command = mhello,fg = 'red',bg='blue').pack()

mEntry = entry().pack 

Also you can position the other window before withdrawing it so that you position your message

from tkinter import *
import tkinter.messagebox

window = Tk()
window.wm_withdraw()

# message at x:200,y:200
window.geometry("1x1+200+200")  # remember its.geometry("WidthxHeight(+or-)X(+or-)Y")
tkinter.messagebox.showerror(title="error", message="Error Message", parent=window)

# center screen message
window.geometry(f"1x1+{round(window.winfo_screenwidth() / 2)}+{round(window.winfo_screenheight() / 2)}")
tkinter.messagebox.showinfo(title="Greetings", message="Hello World!")

Please Note: This is Lewis Cowles’ answer just Python 3ified, since tkinter has changed since python 2. If you want your code to be backwords compadible do something like this:

try:
    import tkinter
    import tkinter.messagebox
except ModuleNotFoundError:
    import Tkinter as tkinter
    import tkMessageBox as tkinter.messagebox

Not the best, here is my basic Message box using only tkinter.

#Python 3.4
from    tkinter import  messagebox  as  msg;
import  tkinter as      tk;

def MsgBox(title, text, style):
    box = [
        msg.showinfo,       msg.showwarning,    msg.showerror,
        msg.askquestion,    msg.askyesno,       msg.askokcancel,        msg.askretrycancel,
];

tk.Tk().withdraw(); #Hide Main Window.

if style in range(7):
    return box[style](title, text);

if __name__ == '__main__':

Return = MsgBox(#Use Like This.
    'Basic Error Exemple',

    ''.join( [
        'The Basic Error Exemple a problem with test',                      '\n',
        'and is unable to continue. The application must close.',           '\n\n',
        'Error code Test',                                                  '\n',
        'Would you like visit http://wwww.basic-error-exemple.com/ for',    '\n',
        'help?',
    ] ),

    2,
);

print( Return );

"""
Style   |   Type        |   Button      |   Return
------------------------------------------------------
0           Info            Ok              'ok'
1           Warning         Ok              'ok'
2           Error           Ok              'ok'
3           Question        Yes/No          'yes'/'no'
4           YesNo           Yes/No          True/False
5           OkCancel        Ok/Cancel       True/False
6           RetryCancal     Retry/Cancel    True/False
"""

check out my python module: pip install quickgui (Requires wxPython, but requires no knowledge of wxPython) https://pypi.python.org/pypi/quickgui

Can create any numbers of inputs,(ratio, checkbox, inputbox), auto arrange them on a single gui.

A recent message box version is the prompt_box module. It has two packages: alert and message. Message gives you greater control over the box, but takes longer to type up.

Example Alert code:

import prompt_box

prompt_box.alert('Hello') #This will output a dialog box with title Neutrino and the 
#text you inputted. The buttons will be Yes, No and Cancel

Example Message code:

import prompt_box

prompt_box.message('Hello', 'Neutrino', 'You pressed yes', 'You pressed no', 'You 
pressed cancel') #The first two are text and title, and the other three are what is 
#printed when you press a certain button

ctype module with threading

i was using the tkinter messagebox but it would crash my code. i didn’t want to find out why so i used the ctypes module instead.

for example:

import ctypes
ctypes.windll.user32.MessageBoxW(0, "Your text", "Your title", 1)

i got that code from Arkelis

i liked that it didn’t crash the code so i worked on it and added a threading so the code after would run.

example for my code

import ctypes
import threading


def MessageboxThread(buttonstyle, title, text, icon):
    threading.Thread(
        target=lambda: ctypes.windll.user32.MessageBoxW(buttonstyle, text, title, icon)
    ).start()

messagebox(0, "Your title", "Your text", 1)

for button styles and icon numbers:

## Button styles:
# 0 : OK
# 1 : OK | Cancel
# 2 : Abort | Retry | Ignore
# 3 : Yes | No | Cancel
# 4 : Yes | No
# 5 : Retry | No
# 6 : Cancel | Try Again | Continue

## To also change icon, add these values to previous number
# 16 Stop-sign icon
# 32 Question-mark icon
# 48 Exclamation-point icon
# 64 Information-sign icon consisting of an 'i' in a circle

You can use pyautogui or pymsgbox:

import pyautogui
pyautogui.alert("This is a message box",title="Hello World")

Using pymsgbox is the same as using pyautogui:

import pymsgbox
pymsgbox.alert("This is a message box",title="Hello World")