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：

__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')
    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