利用Python,Tkinter模块实现简单计算器计算器

博主前段时间学习Tkinter模块想制作一个简单的计算器，贴代码如下：

[code]__author__='PythonStriker'

from tkinter import *
from math import *

# 计算器主窗体
root = Tk()
root.config(bg='#333')
root.geometry('250x380+600+220')
root.title('一个普通计算器       version_2.1')
root.resizable(width=False, height=False)
frame_show = Frame(width=300, height=150, bg='#333')

# 主窗体顶部区域
v = StringVar()
v.set('0')
show_label = Label(frame_show, textvariable=v, bg='#222', width=13, height=1,fg = '#fff' ,font=("黑体", 20, "bold"), justify=LEFT,anchor='e')
show_label.pack(padx=10, pady=10)
frame_show.pack()

# 是否按下了运算符
isopear = False

# 控制弹窗个数
newWindowNumber = 0

# 操作数中小数点个数
pointnumber = 0

# 统计输入运算符个数
opearnumber = 0

# 操作序列
calc = []

# 区分计算与按键计算flag
equal_flag = False

def change(num):
global equal_flag
global isopear
global pointnumber
if isopear == False:
if v.get() == '0' and num != '.':
v.set('')
v.set(num)
elif v.get() == '0' and num == '.':
v.set('0.')
pointnumber = 1
else:
if num == '.' and pointnumber == 1:
pass
elif num == '.' and pointnumber == 0:
v.set(v.get() + num)
pointnumber = 1
else:
if equal_flag:
v.set(num)
equal_flag = False
else:
v.set(v.get() + num)
else:
if num == '.':
v.set('0.')
pointnumber = 1
elif v.get() == '-':
v.set(v.get() + num)
else:
v.set(num)
isopear = False

# 运算
def operation(sign):
global isopear
global calc
global pointnumber
global opearnumber
if isopear == False and opearnumber == 0:
calc.append(v.get())
if sign == '+':
calc.append('+')
elif sign == '-':
calc.append('-')
elif sign == '*':
calc.append('*')
elif sign == '/':
calc.append('/')
elif sign == '%':
calc.append('%')
else:
# 加上符号的情况
if sign == '+':
equal('+')
elif sign == '-':
equal('-')
elif sign == '*':
equal('*')
elif sign == '/':
equal('/')
elif sign == '%':
equal('%')
opearnumber = opearnumber + 1
isopear = True
pointnumber = 0

def equal(sign):
global calc
# 获取当前界面的数值准备运算
calc.append(v.get())
# 组成运算字符串
calcstr = ''.join('%s' % id for id in calc)
# 检测最后一位是否是运算符，是就删除
if calcstr[-1] in '+*/%':
calcstr = calcstr[0:-1]
if lastNoteZero(calcstr):
# 运算操作
if sign == '/':
new_calcstr = calcstr.replace('/', '%')
result = eval(new_calcstr)
if result == 0:
result = int(eval(calcstr))
else:
result = eval(calcstr)
else:
result = eval(calcstr)
else:
result = 'VALUE ERROR'
# 显示结果
if result != 'VALUE ERROR' and result // 10000000 == 0 and result > 0.001 or result == 0:
if type(result) == float:
v.set('%7.3f' % result)
elif type(result) == int:
v.set(result)
elif result == 'VALUE ERROR':
v.set(result)
else:
v.set('%e' % result)
calc.clear()
if result != 'VALUE ERROR':
calc.append(result)
calc.append(sign)

def button_equal():
global equal_flag
global calc
global opearnumber
global isopear
# 获取当前界面的数值准备运算
calc.append(v.get())
# 组成运算字符串
calcstr = ''.join('%s' % id for id in calc)
# 检测最后一位是否是运算符，是就删除
if calcstr[-1] in '+*/%':
calcstr = calcstr[0:-1]
if lastNoteZero(calcstr):
# 运算操作
if '/' in calcstr:
new_calcstr = calcstr.replace('/', '%')
result = eval(new_calcstr.strip())
if result == 0:
result = int(eval(calcstr.strip()))
else:
result = eval(calcstr.strip())
else:
result = eval(calcstr.strip())
else:
result = 'VALUE ERROR'
# 显示结果
if result != 'VALUE ERROR' and result > 0.001 and result//10000000 == 0 or result == 0:
if type(result) == float:
v.set('%7.3f' % result)
elif type(result) == int:
v.set(result)
elif result == 'VALUE ERROR':
v.set(result)
else:
v.set('%e' % result)
calc.clear()
opearnumber = 0
isopear = False
equal_flag = True

# 删除操作
def delete():
global pointnumber
if v.get().strip() == '' or v.get().strip() == '0':
v.set('0')
return
else:
num = len(v.get().strip())
if num > 1:
strnum = v.get()
if strnum[num - 1] == '.':
pointnumber = 0
strnum = strnum[0:num - 1]
v.set(strnum)
else:
v.set('0')

# 清空操作
def clear():
global calc
global isopear
global pointnumber
global opearnumber
global equal_flag
calc = []
opearnumber = 0
v.set('0')
isopear = False
pointnumber = 0
equal_flag = False

# 正负操作
def fan():
global calc
global isopear
strnum = v.get()
if isopear == False:
if strnum[0] == '-':
v.set(strnum[1:])
elif strnum[0] != '-' and strnum != '0':
v.set('-' + strnum)
else:
if v.get() == '-':
v.set('0')
else:
v.set('-')

# 判断除数是否为0
def lastNoteZero(String):
LenOfString = len(String)
for CharNumber in range(0, LenOfString):
if String[CharNumber] == '/' and CharNumber != LenOfString:
if String[CharNumber + 1] == '0':
return False
else:
pass
return True

def higherFunction(sign):
result = 0
flag = 0
if sign == '√x':
if eval(v.get()) < 0:
flag = 1
else:
result = sqrt(eval(v.get()))
elif sign == 'sin':
result = sin(eval(v.get()))
elif sign == 'cos':
result = cos(eval(v.get()))
elif sign == 'tan':
if eval(v.get()) % (0.5*pi) == 0:
flag = 1
else:
result = tan(eval(v.get()))
elif sign == 'lnx':
if eval(v.get()) <= 0:
flag = 1
else:
result = log(eval(v.get()))
elif sign == 'e^x':
result = exp(eval(v.get()))
elif sign == 'log10(x)':
if eval(v.get()) <= 0:
flag = 1
else:
result = log10(eval(v.get()))
elif sign == '1/x':
if eval(v.get()) != 0:
result = eval('1'+'/'+v.get())
else:
flag = 1
else:
if v.get() == '0':
result = pi
v.set(result)
else:
result = eval(v.get())*pi
if flag == 0 :
if result < 0.001 and result // 10000000 == 0 :
if type(result) == float:
v.set('%7.3f' % result)
elif type(result) == int:
v.set(result)
else:
v.set('%e' % result)
else:
v.set('VALUE ERROR')

def creatNewWindows():
# 计算器高级窗体
higher = Toplevel(root)
higher.title('一个高级计算器       version_2.1')
higher.geometry('240x192+852+280')
higher.config(bg='#333')

4000
higher.resizable(width=False, height=False)
button_sin = Button(higher,text='sin', width=10, height=3, command=lambda:higherFunction('sin'),bg = '#333',fg = '#fff').grid(row=0, column=0)
button_cos = Button(higher,text='cos', width=10, height=3, command=lambda:higherFunction('cos'),bg = '#333',fg = '#fff').grid(row=0, column=1)
button_tan = Button(higher,text='tan', width=10, height=3, command=lambda:higherFunction('tan'),bg = '#333',fg = '#fff').grid(row=0, column=2)
button_sqrt= Button(higher,text='√x', width=10, height=3, command=lambda:higherFunction('√x'),bg = '#333',fg = '#fff').grid(row=1, column=0)
button_dao = Button(higher,text='1/x', width=10, height=3, command=lambda:higherFunction('1/x'),bg = '#333',fg = '#fff').grid(row=1, column=1)
button_ln  = Button(higher, text='lnx', width=10, height=3, command=lambda:higherFunction('lnx'),bg = '#333',fg = '#fff').grid(row=1, column=2)
button_e   = Button(higher, text='e^x', width=10, height=3, command=lambda:higherFunction('e^x'),bg = '#333',fg = '#fff').grid(row=2, column=0)
button_log = Button(higher, text='log10(x)', width=10, height=3, command=lambda:higherFunction('log10(x)'),bg = '#333',fg = '#fff').grid(row=2, column=1)
button_Pi  =  Button(higher, text='Π', width=10, height=3, command=lambda:higherFunction('Π'),bg = '#333',fg = '#fff').grid(row=2, column=2)

# 按键区域
frame_bord = Frame(width=400, height=350, bg='#333')
button_del = Button(frame_bord, text='←', width=5, height=1, command=delete,bg = '#b0b0b0',fg = "#000" ).grid(row=0, column=0)
button_yv = Button(frame_bord, text='%', width=5, height=1, command=lambda: operation('%'),bg = '#b0b0b0',fg = "#000").grid(row=0, column=1)
button_fan = Button(frame_bord, text='±', width=5, height=1, command=fan,bg = '#b0b0b0',fg = "#000").grid(row=0, column=2)
button_ce = Button(frame_bord, text='CE', width=5, height=1, command=clear,bg = '#ff8b3d',fg = "#fff").grid(row=0, column=3)
button_1 = Button(frame_bord, text='1', width=5, height=2, command=lambda: change('1'),bg = '#4f4f4f',fg = "#fff").grid(row=1, column=0)
button_2 = Button(frame_bord, text='2', width=5, height=2, command=lambda: change('2'),bg = '#4f4f4f',fg = "#fff").grid(row=1, column=1)
button_3 = Button(frame_bord, text='3', width=5, height=2, command=lambda: change('3'),bg = '#4f4f4f',fg = "#fff").grid(row=1, column=2)
button_jia = Button(frame_bord, text='+', width=5, height=2, command=lambda: operation('+'),bg = '#ff8b3d',fg = "#fff").grid(row=1, column=3)
button_4 = Button(frame_bord, text='4', width=5, height=2, command=lambda: change('4'),bg = '#4f4f4f',fg = "#fff").grid(row=2, column=0)
button_5 = Button(frame_bord, text='5', width=5, height=2, command=lambda: change('5'),bg = '#4f4f4f',fg = "#fff").grid(row=2, column=1)
button_6 = Button(frame_bord, text='6', width=5, height=2, command=lambda: change('6'),bg = '#4f4f4f',fg = "#fff").grid(row=2, column=2)
button_jian = Button(frame_bord, text='-', width=5, height=2, command=lambda: operation('-'),bg = '#ff8b3d',fg = "#fff").grid(row=2, column=3)
button_7 = Button(frame_bord, text='7', width=5, height=2, command=lambda: change('7'),bg = '#4f4f4f',fg = "#fff").grid(row=3, column=0)
button_8 = Button(frame_bord, text='8', width=5, height=2, command=lambda: change('8'),bg = '#4f4f4f',fg = "#fff").grid(row=3, column=1)
button_9 = Button(frame_bord, text='9', width=5, height=2, command=lambda: change('9'),bg = '#4f4f4f',fg = "#fff").grid(row=3, column=2)
button_cheng = Button(frame_bord, text='x', width=5, height=2, command=lambda: operation('*'),bg = '#ff8b3d',fg = "#fff").grid(row=3, column=3)
button_0 = Button(frame_bord, text='0', width=5, height=2, command=lambda: change('0'),bg = '#4f4f4f',fg = "#fff").grid(row=4, column=0)
button_dian = Button(frame_bord, text='.', width=5, height=2, command=lambda: change('.'),bg = '#4f4f4f',fg = "#fff").grid(row=4, column=1)
button_deng = Button(frame_bord, text='=', width=5, height=2, command=button_equal,bg = '#4f4f4f',fg = "#fff").grid(row=4, column=2)
button_chu = Button(frame_bord, text='/', width=5, height=2, command=lambda: operation('/'),bg = '#ff8b3d',fg = "#fff").grid(row=4, column=3)
button_auther = Button(frame_bord, text='查看出版团队', width=25, height=2,command=lambda: print('It is a very nice team!This project made by Mr ma,nie,shao,song!'),bg = '#4f4f4f',fg = "#fff").grid(row=5, column=0, columnspan=4)
button_higher = Button(frame_bord, text='高级', width=5, height=1, command=creatNewWindows,bg = '#4f4f4f',fg = "#fff").grid(row=6, column=3)
frame_bord.pack(padx=10, pady=10)
root.mainloop()

 通过同伴的一次一次纠错，测试得出各种版本，终极版本代码如上所示，依旧解决不了的是python_math函数稍有问题。

效果如下图：

点击高级会出现弹窗如下图所示：

高级功能右下角是一个π，但是显示不完全，稍有不足，计算结果还是比较让人满意的。

附赠各个初级版本，详情可参考博主github:https://github.com/PythonStriker/calculator