Python編程基礎(chǔ)與應(yīng)用 第2版 課習(xí)題答案 李方園 第6章答案

6.1以例程為例，運(yùn)行結(jié)果如圖1所示圖1GUI控件包括：窗口、菜單等。6.2參考程序（注意文件名稱(chēng)不能是jpg，且需要放置在當(dāng)前目錄下）importtkinterastkroot=tk.Tk()#增加背景圖片photo=tk.PhotoImage(file="bg.png")theLabel=tk.Label(root,text="大家好，才是真的好.",#內(nèi)容justify=tk.LEFT,#對(duì)齊方式image=photo,#加入圖片compound=tk.CENTER,#關(guān)鍵:設(shè)置為背景圖片font=("華文行楷",20),#字體和字號(hào)fg="white")#前景色theLabel.pack()tk.mainloop()6.3參考程序（這里是復(fù)選框）importtkinterastktop=tk.Tk()CheckVar1=tk.IntVar()CheckVar2=tk.IntVar()CheckVar3=tk.IntVar()C1=tk.Checkbutton(top,text="One",variable=CheckVar1,\onvalue=1,offvalue=0,height=1,\width=20)C2=tk.Checkbutton(top,text="Two",variable=CheckVar2,\onvalue=1,offvalue=0,height=1,\width=20)C3=tk.Checkbutton(top,text="Three",variable=CheckVar3,\onvalue=1,offvalue=0,height=1,\width=20)C1.pack()C2.pack()C3.pack()top.mainloop()6.4參考程序importtkinterasTK#主窗口root=TK.Tk()root.title("Caculator")root.resizable(0,0)root.geometry('320x420')result=TK.StringVar()equation=TK.StringVar()result.set('')equation.set('0')#獲得按下的數(shù)字或者符號(hào)defgetnum(num):temp=equation.get()temp2=result.get()print(temp)print(temp2)iftemp2!='':temp='0'temp2=''result.set(temp2)if(temp=='0'):temp=''temp=temp+numequation.set(temp)print(equation)#按下退格鍵時(shí)，去除最后一個(gè)字符defback():temp=equation.get()equation.set(temp[:-1])#按下MC時(shí)，清空算式行與結(jié)果行defclear():equation.set('0')result.set('')#按下等于號(hào)時(shí)計(jì)算結(jié)果defrun():temp=equation.get()temp=temp.replace('x','*')temp=temp.replace('÷','/')print(temp)answer=eval(temp)answer='%.2f'%answerresult.set(str(answer))#結(jié)果顯示框show_uresult=TK.Label(root,bg='white',fg='black',font=('Arail','15'),bd='0',textvariable=equation,anchor='se')show_dresult=TK.Label(root,bg='white',fg='black',font=('Arail','30'),bd='0',textvariable=result,anchor='se')show_uresult.place(x='10',y='10',width='300',height='50')show_dresult.place(x='10',y='60',width='300',height='50')#按鈕#第1行按鈕button_7=TK.Button(root,text='7',bg='DarkGray',command=lambda:getnum('7'))button_7.place(x='10',y='150',width='60',height='40')button_8=TK.Button(root,text='8',bg='DarkGray',command=lambda:getnum('8'))button_8.place(x='90',y='150',width='60',height='40')button_9=TK.Button(root,text='9',bg='DarkGray',command=lambda:getnum('9'))button_9.place(x='170',y='150',width='60',height='40')button_multiplication=TK.Button(root,text='X',bg='DarkGray',command=lambda:getnum('x'))button_multiplication.place(x='250',y='260',width='60',height='40')#第2行按鈕button_4=TK.Button(root,text='4',bg='DarkGray',command=lambda:getnum('4'))button_4.place(x='10',y='205',width='60',height='40')button_5=TK.Button(root,text='5',bg='DarkGray',command=lambda:getnum('5'))button_5.place(x='90',y='205',width='60',height='40')button_6=TK.Button(root,text='6',bg='DarkGray',command=lambda:getnum('6'))button_6.place(x='170',y='205',width='60',height='40')button_minus=TK.Button(root,text='—',bg='DarkGray',command=lambda:getnum('-'))button_minus.place(x='250',y='205',width='60',height='40')#第3行按鈕button_1=TK.Button(root,text='1',bg='DarkGray',command=lambda:getnum('1'))button_1.place(x='10',y='260',width='60',height='40')button_2=TK.Button(root,text='2',bg='DarkGray',command=lambda:getnum('2'))button_2.place(x='90',y='260',width='60',height='40')button_3=TK.Button(root,text='3',bg='DarkGray',command=lambda:getnum('3'))button_3.place(x='170',y='260',width='60',height='40')button_plus=TK.Button(root,text='+',bg='DarkGray',command=lambda:getnum('+'))button_plus.place(x='250',y='150',width='60',height='40')#第4、5按鈕button_MC=TK.Button(root,text='C',bg='DarkGray',command=clear)button_MC.place(x='90',y='370',width='60',height='40')button_0=TK.Button(root,text='0',bg='DarkGray',command=lambda:getnum('0'))button_0.place(x='10',y='315',width='140',height='40')button_point=TK.Button(root,text='.',bg='DarkGray',command=lambda:getnum('.'))button_point.place(x='170',y='315',width='60',height='40')button_equal=TK.Button(root,text='=',bg='DarkGray',command=run)button_equal.place(x='170',y='370',width='140',height='40')button_back=TK.Button(root,text='<-',bg='DarkGray',comman