我正在尝试将此计算器转换为多窗口应用程序。我的目标是拥有＆＃34;文件＆＃34;菜单标签在计算器和＆＃34; pig＆＃34;之间切换。帧。猪架将有一个我已设计的猪拉丁语转换器。另一个目标是让其他标签实际上做他们所说的有设置窗口等。
PS：第一次发帖！
import parser
import time
from Tkinter import *
from Tkinter import Tk, W, E
from ttk import Frame, Button, Style
from ttk import Entry
class Calculator(Frame):
def __init__(self, parent):
############## INITIAL COMMIT #####################
Frame.__init__(self, parent)
############## INITIAL CALL #####################
self.parent = parent
self.initcalcUI()
############## INDIVIDUAL FRAMES #####################
self.calc_frame = Frame(self)
self.pig_frame = Frame(self)
############## MENUS #####################
mymenu = Menu(self.parent)
self.parent.config(menu=mymenu)
fileMenu = Menu(mymenu)
fileMenu.add_command(label="My Files", command=self.initcalcUI)
fileMenu.add_command(label="New-File", command=self.initpigUI)
editmenu = Menu(mymenu)
editmenu.add_command(label="Copy")
editmenu.add_command(label="Paste")
historymenu = Menu(mymenu)
historymenu.add_command(label="Display History")
settingsmenu = Menu(mymenu)
settingsmenu.add_command(label="Settings....")
mymenu.add_cascade(label="Files", menu=fileMenu)
mymenu.add_cascade(label="Edit", menu=editmenu)
mymenu.add_cascade(label="History", menu=historymenu)
mymenu.add_cascade(label="Settings", menu=settingsmenu)
def initpigUI(self):
self.forget()
self.parent.title("Pig Latin")
self.pig_frame = Frame(self)
self.pig_frame.pack()
b1 = Button(self.pig_frame, text = "Hello")
b1.pack()
def initcalcUI(self):
self.forget()
self.parent.title("Calculator")
Style().configure("TButton", padding=(0, 5, 0, 5),
font='serif 10')
self.calc_frame = Frame(self)
self.calc_frame.pack()
self.calc_frame.columnconfigure(0, pad=3)
self.calc_frame.columnconfigure(1, pad=3)
self.calc_frame.columnconfigure(2, pad=3)
self.calc_frame.columnconfigure(3, pad=3)
self.calc_frame.rowconfigure(0, pad=3)
self.calc_frame.rowconfigure(1, pad=3)
self.calc_frame.rowconfigure(2, pad=3)
self.calc_frame.rowconfigure(3, pad=3)
self.calc_frame.rowconfigure(4, pad=3)
self.entry = Entry(self.calc_frame)
self.entry.grid(row=0, columnspan=4, sticky=W+E)
cls = Button(self.calc_frame, text="Cls", command = self.clear_all)
cls.grid(row=1, column=0)
bck = Button(self.calc_frame, text="Back")
bck.grid(row=1, column=1)
lbl = Button(self.calc_frame)
lbl.grid(row=1, column=2)
clo = Button(self.calc_frame, text="Close")
clo.grid(row=1, column=3)
sev = Button(self.calc_frame, text="7", command = lambda: self.insert("7"))
sev.grid(row=2, column=0)
eig = Button(self.calc_frame, text="8", command = lambda: self.insert("8"))
eig.grid(row=2, column=1)
nin = Button(self.calc_frame, text="9", command = lambda: self.insert("9"))
nin.grid(row=2, column=2)
div = Button(self.calc_frame, text="/", command = lambda: self.insert("/"))
div.grid(row=2, column=3)
fou = Button(self.calc_frame, text="4", command = lambda: self.insert("4"))
fou.grid(row=3, column=0)
fiv = Button(self.calc_frame, text="5", command = lambda: self.insert("5"))
fiv.grid(row=3, column=1)
six = Button(self.calc_frame, text="6", command = lambda: self.insert("6"))
six.grid(row=3, column=2)
mul = Button(self.calc_frame, text="*", command = lambda: self.insert("*"))
mul.grid(row=3, column=3)
one = Button(self.calc_frame, text="1", command = lambda: self.insert("1"))
one.grid(row=4, column=0)
two = Button(self.calc_frame, text="2", command = lambda: self.insert("2"))
two.grid(row=4, column=1)
thr = Button(self.calc_frame, text="3", command = lambda: self.insert("3"))
thr.grid(row=4, column=2)
mns = Button(self.calc_frame, text="-", command = lambda: self.insert("-"))
mns.grid(row=4, column=3)
zer = Button(self.calc_frame, text="0", command = lambda: self.insert("0"))
zer.grid(row=5, column=0)
dot = Button(self.calc_frame, text=".", command = lambda: self.insert("."))
dot.grid(row=5, column=1)
equ = Button(self.calc_frame, text="=", command=self.calc)
equ.grid(row=5, column=2)
pls = Button(self.calc_frame, text="+", command = lambda: self.insert("+"))
pls.grid(row=5, column=3)
#self.calc_frame.grid_forget()
self.pack()
#self.pack_forget()
def clear_all(self):
self.entry.delete(0, "end")
def insert(self, num):
self.entry.insert("insert", num)
def calc(self, *args):
userinput = self.entry.get()
userlist = []
for i in userinput:
userlist.append(i)
while " " in userlist: userlist.remove(" ")
userequation = ""
for i in userlist:
userequation = userequation + i
equation = parser.expr(userequation).compile()
self.entry.delete(0, "end")
self.entry.insert(0, eval(equation))
def forget(self):
self.calc_frame.grid_remove()
self.pig_frame.grid_remove()
root = Tk()
app = Calculator(root)
root.mainloop()
下面是解释器抛出的错误：
Traceback (most recent call last):
File "Documents\GUI Calculator.py", line 160, in <module>
app = Calculator(root)
File "Documents\GUI Calculator.py", line 18, in __init__
self.initcalcUI()
File "Documents\GUI Calculator.py", line 61, in initcalcUI
self.forget()
File "Documents\GUI Calculator.py", line 157, in forget
self.calc_frame
AttributeError: Calculator instance has no attribute 'calc_frame'
答案 0 :(得分：2)
问题是initcalcUI()调用forget()，然后在调用后的几行内为self.calc_frame分配值。您将遇到与self.pig_frame相同的问题。
在forget()中，您可以使用以下方法测试以查看属性是否存在：
def forget(self):
if hasattr(self, 'calc_frame'):
self.calc_frame.grid_remove()
if hasattr(self, 'pig_frame'):
self.pig_frame.grid_remove()
或者，您可以将每个来电换入try/except并忽略AttributeError。