余弦绘图 [英] Cosinus drawing

问题描述

我想编写一个程序来绘制有序范围内的余弦图。但是有一个错误，我无法修复。错误消息： z = int（self.entry.get（））
AttributeError：程序实例没有属性 entry这是我的代码：

I'd like to make a program which draws a cosinus graph in orderd range. But there is an error which I'm not able to repair. Error Message: "z = int(self.entry.get()) AttributeError: program instance has no attribute 'entry" Here is my code:

 # -*- coding: utf-8 -*-

from Tkinter import Tk, W, E
from ttk import Label, Button, Frame, Entry,Style
import math
import sys
import matplotlib as mp

class program(Frame):

    def __init__(self,main):

        Frame.__init__(self,main)        
        self.main = main       
        self.initUI()

    def initUI(self):

        self.main.title('COSINUSEK')
        Style().configure('TFrame', background = 'black')
        Style().configure('TLabel', background = 'black', foreground = 'blue')
        Style().configure("TButton", background = 'red', foreground = 'blue')


        self.rowconfigure(0, pad = 3)
        self.rowconfigure(1, pad = 3)
        self.rowconfigure(2, pad = 3)
        self.rowconfigure(3, pad = 3)
        self.rowconfigure(4, pad = 3)

        self.columnconfigure(0,pad =3)
        self.columnconfigure(1,pad =3)
        self.columnconfigure(2,pad =3)
        self.columnconfigure(3,pad =3)
        self.columnconfigure(4,pad =3)



        label = Label(self, text = 'Podaj zakres w stopniach').grid(row = 0,column = 3)
        od = Label(self, text = '     OD').grid(row = 1, column =0)
        do = Label(self, text = '             DO').grid(row = 1, column =4 )
        entry = Entry(self, justify = 'center').grid(row = 2,column = 0,columnspan = 2 ,sticky = E+ W)
        entry1 = Entry(self, justify = 'center').grid(row = 2,column = 4,columnspan = 2, sticky = E)
        button =  Button(self, text = 'Ok',command = self.ok).grid(row = 3,column = 3)
        button1 = Button(self, text = 'Draw', command = self.dra).grid(row = 4, column = 3)

        self.pack()

    def run(self):
        self.main.mainloop()

    def ok(self):
        x = []
        y = []
        z = int(self.entry.get())
        w = int(self.entry1.get())
        i = w
        while i in range(w,z):
            x.append(i)
            for a in x:
                y[a] = math.cos((x[a]*math.pi)/180)
            i = i + 0.01
    def dra(self):
        self.mp.ion() 
        self.mp.plot(self.x,self.y)
        self.mp.title('Wykres')
        self.mp.xlabel('x')
        self.mp.ylabel('y')
        self.mp.draw()  



program(Tk()).run()

推荐答案

替换：

entry = Entry(self, justify = 'center').grid(row = 2,column = 0,columnspan = 2 ,sticky = E+ W)
entry1 = Entry(self, justify = 'center').grid(row = 2,column = 4,columnspan = 2, sticky = E)

到

self.entry = Entry(self, justify = 'center')
self.entry.grid(row = 2,column = 0,columnspan = 2 ,sticky = E+ W)
self.entry1 = Entry(self, justify = 'center')
self.entry1.grid(row = 2,column = 4,columnspan = 2, sticky = E)

否则，在行 z = int（self.entry.get（ ））， self.entry 不存在。另外， grid 方法不会返回任何内容，因此，如果您像以前一样在一行中进行所有操作，则会丢失 Entry 对象并影响无进入条目。

Otherwise, at line z = int(self.entry.get()), self.entry would not exist. Also, the grid method doesn't return anything so, if you do everything in one line as you did, you lose your Entry object and affect None to entry.

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