python的tkinter编写计算器_自学python-tkinter-计算器

from tkinter import *

importmathclasscalculator():def __init__(self):globaltk

tk= Tk() #注意不能用self = Tk(),相当于将子类重新赋值了

tk.geometry('480x500')

tk.title('计算器')

show= Frame(width=600, height=300, bg='#dddddd')

show.pack()

self.sv=StringVar()

self.sv.set('初始状态')

show_label= Label(show, textvariable=self.sv, bg='#eeeeee', width=34, height=4,

font=('黑体', 18, 'bold',), justify=LEFT, anchor='e')

show_label.pack(padx=10, pady=10)

k_area= Frame(width=600, height=350, bg='#cccccc')

k_area.pack()#数据初始化

self.num1 = ''self.num2= ''self.pms1=[]

self.pms2=[]

self.num1_list=[]

self.num2_list=[]

self.operat=[]

w= 5h= 1key_1= Button(k_area, text='1', width=w, height=h, command=lambda: self.num_in('1'),

bg='yellow', font=('黑体', 30, 'bold'))

key_1.grid(row=1, column=0)

key_2= Button(k_area, text='2', width=w, height=h, command=lambda: self.num_in('2'),

bg='yellow', font=('黑体', 30, 'bold'))

key_2.grid(row=1, column=1)

key_3= Button(k_area, text='3', width=w, height=h, command=lambda: self.num_in('3'),

bg='yellow', font=('黑体', 30, 'bold'))

key_3.grid(row=1, column=2)

key_4= Button(k_area, text='4', width=w, height=h, command=lambda: self.num_in('4'),

bg='yellow', font=('黑体', 30, 'bold'))

key_4.grid(row=2, column=0)

key_5= Button(k_area, text='5', width=w, height=h, command=lambda: self.num_in('5'),

bg='yellow', font=('黑体', 30, 'bold'))

key_5.grid(row=2, column=1)

key_6= Button(k_area, text='6', width=w, height=h, command=lambda: self.num_in('6'),

bg='yellow', font=('黑体', 30, 'bold'))

key_6.grid(row=2, column=2)

key_7= Button(k_area, text='7', width=w, height=h, command=lambda: self.num_in('7'),

bg='yellow', font=('黑体', 30, 'bold'))

key_7.grid(row=3, column=0)

key_8= Button(k_area, text='8', width=w, height=h, command=lambda: self.num_in('8'),

bg='yellow', font=('黑体', 30, 'bold'))

key_8.grid(row=3, column=1)

key_9= Button(k_area, text='9', width=w, height=h, command=lambda: self.num_in('9'),

bg='yellow', font=('黑体', 30, 'bold'))

key_9.grid(row=3, column=2)

key_0= Button(k_area, text='0', width=w, height=h, command=lambda: self.num_in('0'),

bg='yellow', font=('黑体', 30, 'bold'))

key_0.grid(row=4, column=1)

key_point= Button(k_area, text='.', width=w, height=h, command=lambda: self.num_in('.'),

bg='yellow', font=('黑体', 30, 'bold'))

key_point.grid(row=4, column=2)

key_pms= Button(k_area, text='±', width=w, height=h, command=self.pms,

bg='yellow', font=('黑体', 30, 'bold'))

key_pms.grid(row=3, column=3)

key_close= Button(k_area, text='Close', width=w, height=h, bg='red', command=self.close,

font=('黑体', 30, 'bold'))

key_close.grid(row=4, column=0)

key_plus= Button(k_area, text='+', width=w, height=h, command=lambda: self.operat_in('+'),

bg='yellow', font=('黑体', 30, 'bold'))

key_plus.grid(row=1, column=3)

key_minus= Button(k_area, text='-', width=w, height=h, command=lambda: self.operat_in('-'),

bg='yellow', font=('黑体', 30, 'bold'))

key_minus.grid(row=2, column=3)

key_multiply= Button(k_area, text='x', width=w, height=h, command=lambda: self.operat_in('x'),

bg='yellow', font=('黑体', 30, 'bold'))

key_multiply.grid(row=0, column=2)

key_divide= Button(k_area, text='÷', width=w, height=h, command=lambda: self.operat_in('÷'),

bg='yellow', font=('黑体', 30, 'bold'))

key_divide.grid(row=0, column=1)

key_equal= Button(k_area, text='=', width=w, height=h, command=self.result,

bg='yellow', font=('黑体', 30, 'bold'))

key_equal.grid(row=4, column=3)

key_c= Button(k_area, text='Clear', width=w, height=h, command=self.data_empty,

bg='yellow', font=('黑体', 30, 'bold'))

key_c.grid(row=0, column=0)

key_del= Button(k_area, text='←', width=w, height=h, command=self.str_delete,

bg='yellow', font=('黑体', 30, 'bold'))

key_del.grid(row=0, column=3)

tk.mainloop()defpms(self):if self.operat ==[]:

self.num1_pms()else:

self.num2_pms()defnum1_pms(self):if self.pms1 ==[]:

self.pms1= ['-']

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)else:

self.pms1=[]

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)defnum2_pms(self):if self.pms2 ==[]:

self.pms2= ['-']

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)else:

self.pms2=[]

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)defnum_in(self, n):if self.operat ==[]:

self.num1_in(n)else:

self.num2_in(n)defnum1_in(self, n):if n == '.' and n inself.num1_list:pass

else:

self.num1_list.append(n)

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)defnum2_in(self, n):if n == '.' and n inself.num2_list:pass

else:

self.num2_list.append(n)

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)defoperat_in(self, op):if self.num1_list == [] or self.num1_list == ['.']:pass

else:if self.operat ==[]:

self.operat.append(op)

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)else:pass

defdata_empty(self):

self.num1= ''self.num2= ''self.pms1=[]

self.pms2=[]

self.num1_list=[]

self.num2_list=[]

self.operat=[]

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)defstr_delete(self):if self.num2_list !=[]:

l=len(self.num2_list)

self.num2_list.remove(self.num2_list[l- 1])

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)elif self.num2_list == [] and self.pms2 !=[]:

self.pms2=[]

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)elif self.num2_list == [] and self.pms2 == [] and self.operat !=[]:

self.operat=[]

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)elif self.operat == [] and self.num1_list !=[]:

l=len(self.num1_list)

self.num1_list.remove(self.num1_list[l- 1])

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)elif self.num1_list == [] and self.pms1 !=[]:

self.pms1=[]

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)else:pass

defnum_pro(self, n):if n ==self.num1:if self.pms1 !=[]:

self.num1=self.pms1[0]else:

self.num1= ''

for i inself.num1_list:

self.num1+=iif '.' inself.num1_list:

self.num1=float(self.num1)else:

self.num1=int(self.num1)else:if self.pms2 !=[]:

self.num2=self.pms2[0]else:

self.num2= ''

for i inself.num2_list:

self.num2+=iif '.' inself.num2_list:

self.num2=float(self.num2)else:

self.num2=int(self.num2)defresult(self):if self.num2_list == [] or self.num2_list == ['.']:pass

else:

self.num_pro(self.num1)

self.num_pro(self.num2)if self.operat == ['+']:

r= self.num1 +self.num2

self.data_empty()

self.num1_list=list(str(r))

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)elif self.operat == ['-']:

r= self.num1 -self.num2

self.data_empty()

self.num1_list=list(str(r))

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)elif self.operat == ['x']:

r= self.num1 *self.num2

self.data_empty()

self.num1_list=list(str(r))

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)elif self.operat == ['÷']:try:

r= self.num1 /self.num2

self.data_empty()

self.num1_list=list(str(r))

self.sv.set(self.pms1+ self.num1_list + self.operat + self.pms2 +self.num2_list)exceptZeroDivisionError:

self.sv.set('除数不能为0')exceptException:pass

defclose(self):

tk.destroy()if __name__ == '__main__':

cc= calculator()