Question

我正在尝试使用tkinter和ttk创建一个窗口。当我在Windows 7 Pro PC上运行脚本时，我得到的错误是没有名为ttk的模块，但是当我查看我的PC时，我看到了模块。这个确切的脚本也适用于我的RPi没有问题。我究竟做错了什么？我是否需要重新安装ttk，若然，怎么做？

try:
    import tkinter as tk
    from tkinter import * 
except:
    import Tkinter as tk
    from Tkinter import *
import ttk

class MainWindow(tk.Frame):
    def __init__(self, master):
        self.master = master
        tk.Frame.__init__(self,master)

        tk.Label(self, text = 'Hi').grid(row = 1, column = 1)
        tk.Button(self, text = 'Button 1', width = 10, fg = 'red', command = self.button).grid(row = 2, column = 1)

        self.grid()

    def button(self):
        print('Yo')
if __name__ == '__main__':
    root = tk.Tk()
    MainWindow(root)
    root.mainloop

Answer 1

对于Python3，导入ttk的方法如下

from tkinter import ttk

或者

from tkinter import *
from tkinter.ttk import *

覆盖tkinter基本小部件。

对于Python 2

import ttk

或者

from Tkinter import *
from ttk import *

是记录在案的方法。

如果这些都不起作用，则表明安装有问题。

（如果您使用的是Python 2.7，请开始使用Python 3，Python 2 is almost end of life）。

Answer 2

更新

所以我看到你的程序有几个问题。

请记住tkinter和ttk在Windows版本上默认带有python。你不应该重新安装tkinter。如果您的python出现问题，那么您应该重新安装python。

此处的问题不是ttk导入，而是mainloop您必须使用()调用mainloop，所以请改为mainloop()。

如果您只将root.mainloop更改为root.mainloop()，您的程序将在python 2中运行。

但是你的程序有几个问题。

看看以下内容：

try:
    # Python 3.x
    import tkinter as tk
    from tkinter import ttk #this is how we import for Python 3.x
except:
    # Python 2.x
    import Tkinter as tk
    import ttk # this needs to be inside the except: not outside like you had it.
    # this is because if you were to move to python 3 with this it would not work and cause an error.

class MainWindow(tk.Frame):
    # I added in the *args and ** kwargs to show what a full class __init__ can accept.
    def __init__(self, master, *args, **kwargs): 
        tk.Frame.__init__(self, master, *args, **kwargs)

        self.master = master
        # for your label and button you need to set it as a variable.
        self.my_label = tk.Label(self.master, text = 'Hi').grid(row = 1, column = 1)
        self.my_button = tk.Button(self.master, text = 'Button 1', width = 10, fg = 'red', command = self.button).grid(row = 2, column = 1)

    def button(self):
        print'Yo'
        # print('Yo') # python 3

if __name__ == "__main__":
    root = tk.Tk() 
    app = MainWindow(root) # you should define your main window as something. This way you can interact with the object from outside.
    tk.mainloop() # this must be called in order to tkinter to work.

更新

你在评论中的问题：

import tkinter as tk


class MintApp(tk.Frame):
    def __init__(self, parent, *args, **kwargs):
        tk.Frame.__init__(self, parent, *args, **kwargs)
        self.root = parent
        self.py_frame_color = "orange" # this is an attribute
        self.root.config(bg = self.py_frame_color)


if __name__ == "__main__":
    root = tk.Tk() 

    MyApp = MintApp(root)

    print(MyApp.root.cget('bg'))

    tk.mainloop()

控制台结果：

orange

通过为我们正在创建对象的类命名，我们可以从类外部与其属性进行交互。

我们还可以从类外部更改对象的属性。如果您要将此行MyApp.root.config(bg = "blue")添加到示例中，您将看到窗口更改为蓝色。

没有名为'ttk'的模块，但它在文件夹中

2 个答案: