python tkinter example
The program creates a simple Tkinter window, which realizes the function of clicking the button to display greetings after the user enters a name; 2. Use tk.Tk() to initialize the main window, build the interface through Label, Entry, Button and other controls, and use pack() to layout; 3. Bind the button click event to the greeting function through command=greet to realize event processing; 4. The greet function obtains the content of the input box. If it is not empty, use the config() method to update the result_label to display greetings, otherwise it will be prompted to have an error in input; 5. The program starts the main event loop through root.mainloop() and waits for user interaction; 6. Extension suggestions include using grid() instead to layout, adding clear buttons, binding Enter key events, and beautifying the interface. This is a complete basic Tkinter application example covering the core concepts of control usage, event processing, and interface updates.
Here is a practical Python Tkinter example suitable for beginners to understand basic controls and event handling. This example implements a simple "greeting program": the user enters a name, and then clicks the button to display the greeting in the window.
?️ Simple Tkinter Example: Greeting Program
import tkinter as tk
# Create main window root = tk.Tk()
root.title("Greeting App")
root.geometry("300x150") # Set window size# Tag: Prompt the user to enter label = tk.Label(root, text="Enter your name:")
label.pack(pady=10)
# Input box entry = tk.Entry(root, width=25)
entry.pack(pady=5)
# The label that displays the result result_label = tk.Label(root, text="", fg="blue", font=("Helvetica", 10))
result_label.pack(pady=10)
# Button click event handling function def greet():
name = entry.get() # Get input if name.strip():
result_label.config(text=f"Hello, {name}!")
else:
result_label.config(text="Please enter a name!", fg="red")
# Button button = tk.Button(root, text="Greet", command=greet)
button.pack(pady=5)
# Run the main loop root.mainloop()? Key points description
✅ 1. tk.Tk() creates the main window
This is the starting point for all Tkinter programs, representing the main application window.
✅ 2. Common controls
-
Label: Display text -
Entry: Single-line text input -
Button: Clickable button -
pack(): Simple layout manager (alsogrid()andplace())
✅ 3. Event binding
Bind the button click to the function via command=greet , be careful not to write it as greet() (with brackets will be executed immediately).
✅ 4. Dynamic update interface
Use the .config() method to modify control properties (such as text, color, etc.).
? Operation effect
- Open the program window
- Enter your name in the input box (such as "Alice")
- Click the "Greet" button
- The window will display:
Hello, Alice!
?️ Extension suggestions (advanced direction)
You can try this on this basis:
- Use
grid()layout instead ofpack()to control position more accurately - Add Clear button: Reset input and results
- Press Enter to trigger a greeting (bind
<return></return>event) - Change the font, background color or add icons (
.ico)
This example covers the most basic and commonly used elements of Tkinter, which is suitable for beginner GUI programming. Basically all this is it, not complicated but it is easy to ignore details, such as input verification and event binding methods.
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