askstring
时间: 2023-08-07 18:09:07 浏览: 125
`askstring`是一个Python Tkinter模块中的函数,用于在GUI应用程序中显示一个简单的对话框,以提示用户输入字符串。它接受三个参数:对话框标题,提示文本和默认值。函数将返回用户输入的字符串或None(如果用户取消了对话框)。以下是一个使用askstring函数的示例:
```python
from tkinter import *
from tkinter.simpledialog import askstring
root = Tk()
root.withdraw()
result = askstring("Input", "Please enter your name:", default="John Doe")
if result:
print("Hello, " + result + "!")
else:
print("No name entered!")
```
这将显示一个对话框,要求用户输入他们的名字。如果用户输入了他们的名字并单击"OK"按钮,程序将打印一个问候语。如果用户单击"Cancel"按钮或关闭对话框,程序将打印一个错误消息。
相关问题
simpledialog.askstring
Sure, I can help you with that! `simpledialog.askstring` is a function in the `tkinter` library of Python. It is used to display a pop-up dialog box that prompts the user to enter a string.
Here's an example of how you can use `simpledialog.askstring`:
```python
from tkinter import simpledialog
# Create a root window
root = Tk()
root.withdraw()
# Prompt the user for a string
user_string = simpledialog.askstring("Input", "Enter a string:")
# Print the user's input
print("User entered:", user_string)
```
When you run this code, a dialog box will appear with the message "Enter a string:". The user can then type in a string and press OK to submit it. The value entered by the user will be stored in the variable `user_string`. In this example, we simply print the entered string.
Let me know if you have any further questions!
tkinter中的askstring参数
在Tkinter中,askstring函数用于显示一个简单的对话框,让用户输入一个字符串。其语法如下:
```
askstring(title, prompt, **kwargs)
```
其中,`title`是对话框的标题,`prompt`是提示用户输入的消息。此外,还可以使用一些可选参数,例如:
- `initialvalue`:输入框中的初始值;
- `parent`:对话框的父窗口;
- `minvalue`:输入框中允许输入的最小值;
- `maxvalue`:输入框中允许输入的最大值。
下面是一个示例程序:
```python
from tkinter import *
import tkinter.simpledialog as dl
root = Tk()
def callback():
name = dl.askstring("Name", "What's your name?", initialvalue="John")
print("Hello, " + name + "!")
Button(root, text="Say Hello", command=callback).pack()
root.mainloop()
```
运行程序后,点击“Say Hello”按钮,会弹出一个对话框,提示用户输入名字。用户输入后,程序会输出“Hello, 名字!”的消息。
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