python弹框二之tkinter.messagebox

        前面写过python弹框的ctypes.windll.user32方法：https://blog.csdn.net/Gordennizaicunzai/article/details/78966694

该方法调用windows系统的user32组件，不是纯python方法，且wser32的MessageBoxA使用不当会出现乱码，不是很好用。这里介绍pythonic的弹框——tkinter.messagebox。

NAME
    tkinter.messagebox

DESCRIPTION
    # tk common message boxes
    #
    # this module provides an interface to the native message boxes
    # available in Tk 4.2 and newer.
    #
    # written by Fredrik Lundh, May 1997
    #

CLASSES
    tkinter.commondialog.Dialog(builtins.object)
        Message
    
    class Message(tkinter.commondialog.Dialog)
     |  Message(master=None, **options)
     |  
     |  A message box
     |  
     |  Method resolution order:
     |      Message
     |      tkinter.commondialog.Dialog
     |      builtins.object
     |  
     |  Data and other attributes defined here:
     |  
     |  command = 'tk_messageBox'
     |  
     |  ----------------------------------------------------------------------
     |  Methods inherited from tkinter.commondialog.Dialog:
     |  
     |  __init__(self, master=None, **options)
     |      Initialize self.  See help(type(self)) for accurate signature.
     |  
     |  show(self, **options)
     |  
     |  ----------------------------------------------------------------------
     |  Data descriptors inherited from tkinter.commondialog.Dialog:
     |  
     |  __dict__
     |      dictionary for instance variables (if defined)
     |  
     |  __weakref__
     |      list of weak references to the object (if defined)

FUNCTIONS

showinfo(title=None, message=None, **options)
        Show an info message

注意，tkinter.messagebox默认主窗口是显示状态，我们弹框时它是多于的，需要隐藏。

>>> import tkinter as tk
>>> from tkinter import messagebox as messagebox
>>> 
>>> messagebox.showinfo('弹框', '注意，主窗口未退出')
'ok'
>>> 

   

隐藏主窗口，函数要放在弹框前，否则无效：

showerror(title=None, message=None, **options)
        Show an error message

>>> tk.Tk().withdraw()  # 隐藏主窗口
''
>>> messagebox.showerror('弹框', 'say something')
'ok'
>>> 

    

    
    showwarning(title=None, message=None, **options)
        Show a warning message

>>> tk.Tk().deiconify()  # 显示主窗口
''
>>> messagebox.showwarning('弹框', 'say something')
'ok'
>>> 

askokcancel(title=None, message=None, **options)
        Ask if operation should proceed; return true if the answer is ok

        选择确定/取消，返回值分别对应true/false，下同：

>>> 
>>> tk.Tk().withdraw()  # 隐藏主窗口
''
>>> msg = messagebox.askokcancel('对话框', '请选择')
>>> msg
False
>>> 

    askquestion(title=None, message=None, **options)
        Ask a question

>>> 
>>> msg = messagebox.askquestion('对话框', '请选择')
>>> 

    
    askretrycancel(title=None, message=None, **options)
        Ask if operation should be retried; return true if the answer is yes

msg = messagebox.askretrycancel('对话框', '请选择')

    
    askyesno(title=None, message=None, **options)
        Ask a question; return true if the answer is yes
    

 msg = messagebox.askyesno('对话框', '请选择')

    askyesnocancel(title=None, message=None, **options)
        Ask a question; return true if the answer is yes, None if cancelled.

>>> msg = messagebox.askyesnocancel('对话框', '请选择')
>>> msg
True
>>> msg = messagebox.askyesnocancel('对话框', '请选择')
>>> msg
False
>>> msg = messagebox.askyesnocancel('对话框', '请选择')
>>> msg
>>> 

    

DATA
    ABORT = 'abort'
    ABORTRETRYIGNORE = 'abortretryignore'
    CANCEL = 'cancel'
    ERROR = 'error'
    IGNORE = 'ignore'
    INFO = 'info'
    NO = 'no'
    OK = 'ok'
    OKCANCEL = 'okcancel'
    QUESTION = 'question'
    RETRY = 'retry'
    RETRYCANCEL = 'retrycancel'
    WARNING = 'warning'
    YES = 'yes'
    YESNO = 'yesno'
    YESNOCANCEL = 'yesnocancel'