Question

我才刚刚开始学习Python，并且无法使GUI与我的应用程序一起使用。这是我想要的功能：

1）用户在文本框中输入字符串<100个字符

2）程序一次从字符串中切出5个字符，并计算子字符串中字母“ A”和“ B”的数量

3）程序将5个字符的子字符串和每个字母的＃打印到GUI文本框

这是我到目前为止所拥有的：

from tkinter import *
from tkinter.ttk import *

class App(Frame):

    def __init__(self):
        super().__init__()

        # Global variables
        self.input_text = StringVar
        self.output_text = StringVar
        self.letter_A = 0
        self.letter_B = 0
        self.launchGUI()

    def launchGUI(self):
        self.button_selected_string = StringVar()
        self.pack(fill=BOTH, expand=True)

        self.topFrame = Frame(self)
        self.topFrame.grid(row=0)
        self.bottomFrame = Frame(self)
        self.bottomFrame.grid(row=2)

        # Input textbox
        self.input_textbox = Text(self.topFrame, height=5, width=50, borderwidth=2, relief=RIDGE)
        self.input_textbox.grid(row=1)

        # Output textbox
        self.output_textbox = Text(self.bottomFrame, height=5, width=50, borderwidth=2, relief=RIDGE)
        self.output_textbox.grid(row=2)

        # Submit button
        self.submitButton = Button(self.bottomFrame, text="Submit", width=30, command=self.print_result)
        self.submitButton.grid(row=1)

        # Radio button
        self.radioButton1 = Radiobutton(self.bottomFrame, text="Name of Button", variable=self.button_selected_string,
                                        value="BUTTON_SELECTED",
                                        command=self.get_button_state)
        self.radioButton1.grid(row=0)

    # Function for printing result in textbox
    def print_result(self):
        self.iterate() # Calls another method
        self.output_textbox.insert("1.0", str(self.output_text) + str(self.letter_A) + str(self.letter_B))

    # Function that retrieves result of user selection and stores as String
    def get_button_state(self):
        self.button_selected_string.get()

    def iterate(self):
        temp = self.input_textbox.get("1.0", "end-1c")
        if self.get_button_state() == "BUTTON_SELECTED": # Will always be selected for the purpose of example
            i = 100
            while i > 20:
                temp = temp[(i - 5):i]
                self.output_text = self.count_letters(temp)
                i = i - 1
        return self.output_text

    def count_letters(self):

        for y in self.output_text:
            for x in y:
                if x == 'A' or x == 'a':
                    self.letter_A += 1
                elif x == 'B' or x == 'b':
                    self.letter_B += 1
        return self.output_text

def main():
    root = Tk()
    root.geometry("350x300+300+300")
    app = App()
    root.mainloop()


if __name__ == '__main__':
    main()

问题（在很多情况下，我可以确定）是，当我尝试打印结果时，我没有得到5个字符长的子字符串以及字母“ A”和“ B”的数量的列表得到：

<class 'tkinter.StringVar'>00

似乎我有类型错误，可能是在弄乱变量的范围，但是我不确定如何继续...

任何帮助将不胜感激！

带有tkinter GUI的OOP：挣扎于可变范围和字符串切片

0 个答案: