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This article mainly introduces "what are the Python Tkinter standard dialog module". In the daily operation, I believe many people have doubts about the Python Tkinter standard dialog module. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "what are the Python Tkinter standard dialog module?" Next, please follow the editor to study!

Tkinter provides three standard dialog modules, which are:

Messagebox .

Filedialog .

Colorchooser

These three modules were originally independent, namely tkMessageBox, tkFileDialog and tkColorChooser, and need to be imported before they can be used. After Python3, these modules are all under the control of the tkinter module.

Messagebox (message dialog box) import tkinter as tk from tkinter import messagebox root = tk.Tk () def callback (): result = messagebox.askyesno (message=' confirm selection?) Print (result) tk.Button (root, text= "Select", command=callback). Pack () tk.mainloop ()

The following figure lists all the standard dialog box styles that can be created using messagebox

Parameters.

All of these functions have the same parameters:

There is no doubt that the title parameter is the text that sets the title bar.

The message parameter is the main text content of the settings dialog box, and line wrapping can be achieved with'\ n'.

The options and meanings that can be set for the options parameter are shown in the following table.

Return value

Askokcancel (), askretrycancel (), and askyesno () return Boolean values:

Returning True indicates that the user clicked the OK or Yes button.

Returning False indicates that the user clicked the cancel or No button.

Askquestion () returns the string "yes" or "no" to indicate that the user clicked the Yes or No button.

Showerror (), showinfo (), and showwarning () return "ok" to indicate that the user clicked the "Yes" button.

Filedialog (file dialog box)

The file dialog box is particularly important when the application needs to use the ability to open or save a file. This is how it works:

# p15_62.pyfrom tkinter import * from tkinter import filedialog root = Tk () def callback (): filename = filedialog.askopenfilename () print (filename) Button (root, text= "Open File", command=callback). Pack () mainloop ()

The filedialog module provides two functions: askopenfilename (* * option) and asksaveasfilename (* * option), which are used to open and save files, respectively.

Parameters.

The options available for both functions are the same, and the following table lists the available options and meaning.

Return value

If the user selects a file, the return value is the full path to the file.

If the user clicks the cancel button, the return value is an empty string.

Colorchooser (color selection dialog box)

The color selection dialog box provides an interface for users to choose colors. Take a look at the following example:

# p15_63.py from tkinter import * from tkinter import colorchooser root = Tk () def callback (): fileName = colorchooser.askcolor () print (fileName) Button (root, text= "Select Color", command=callback). Pack () mainloop () parameter

The color parameter of the askcolor (color, * * option) function is used to specify the initialization color, which is light gray by default; the options and meanings that can be specified by the option parameter are shown in the following table

Return value

If the user selects a color and clicks the OK button, the return value is a binary, the first element is the selected RGB color value, and the second element is the corresponding hexadecimal color value.

If the user clicks the cancel button, the return value is (None,None).

At this point, the study of "what are the modules of the Python Tkinter standard dialog box" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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