來來來，用Python做一個計算器
之前跟大家說了，我是計算機學院的，那麼，我今天就給大家展示一下我的才華吧！！！！
今天，我們要用Python的turtle模塊和math模塊製作一個簡易計算器，好了，不多說了，效果圖奉上
是不是很棒棒？好了，現在，我來手把手教大家做這個程序，最後奉上全部源代碼。
現在，我們就要做一個超級無敵必不可少的步驟，那就是——是——是——是——打開編輯器。
好了，下一步就是激活模塊，代碼如下：
import math
import tkinter
然後，就要開始編寫代碼了，這個代碼呢，我們主要屬於兩個部分：計算器的構建和計算機的運行。
現在呢，我們開始我們的第一部分。
首先，我們需要構建一個探測系統，代碼如下：
root = tkinter.Tk()
root.resizable(width=False, height=False)
'''hypeparameter'''
#是否按下了運算符
IS_CALC = False
#存儲數字
STORAGE = []
#顯示框最多顯示多少個字符
MAXSHOWLEN = 18
#當前顯示的數字
CurrentShow = tkinter.StringVar()
CurrentShow.set('0')
好了，然後是判斷系統
'''按下數字鍵(0-9)'''
def pressNumber(number):
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if CurrentShow.get() == '0':
CurrentShow.set(number)
else:
if len(CurrentShow.get()) < MAXSHOWLEN:
CurrentShow.set(CurrentShow.get() + number)
'''按下小數點'''
def pressDP():
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if len(CurrentShow.get().split('.')) == 1:
if len(CurrentShow.get()) < MAXSHOWLEN:
CurrentShow.set(CurrentShow.get() + '.')
'''清零'''
def clearAll():
global STORAGE
global IS_CALC
STORAGE.clear()
IS_CALC = False
CurrentShow.set('0')
'''清除當前顯示框內所有數字'''
def clearCurrent():
CurrentShow.set('0')
'''刪除顯示框內最後一個數字'''
def delOne():
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if CurrentShow.get() != '0':
if len(CurrentShow.get()) > 1:
CurrentShow.set(CurrentShow.get()[:-1])
else:
CurrentShow.set('0')
'''計算答案修正'''
def modifyResult(result):
result = str(result)
if len(result) > MAXSHOWLEN:
if len(result.split('.')[0]) > MAXSHOWLEN:
result = 'Overflow'
else:
# 直接捨去不考慮四捨五入問題
result = result[:MAXSHOWLEN]
return result
'''按下運算符'''
def pressOperator(operator):
global STORAGE
global IS_CALC
if operator == '+/-':
if CurrentShow.get().startswith('-'):
CurrentShow.set(CurrentShow.get()[1:])
else:
CurrentShow.set('-'+CurrentShow.get())
elif operator == '1/x':
try:
result = 1 / float(CurrentShow.get())
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'sqrt':
try:
result = math.sqrt(float(CurrentShow.get()))
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'MC':
STORAGE.clear()
elif operator == 'MR':
if IS_CALC:
CurrentShow.set('0')
STORAGE.append(CurrentShow.get())
expression = ''.join(STORAGE)
try:
result = eval(expression)
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'MS':
STORAGE.clear()
STORAGE.append(CurrentShow.get())
elif operator == 'M+':
STORAGE.append(CurrentShow.get())
elif operator == 'M-':
if CurrentShow.get().startswith('-'):
STORAGE.append(CurrentShow.get())
else:
STORAGE.append('-' + CurrentShow.get())
elif operator in ['+', '-', '*', '/', '%']:
STORAGE.append(CurrentShow.get())
STORAGE.append(operator)
IS_CALC = True
elif operator == '=':
if IS_CALC:
CurrentShow.set('0')
STORAGE.append(CurrentShow.get())
expression = ''.join(STORAGE)
try:
result = eval(expression)
# 除以0的情況
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
STORAGE.clear()
IS_CALC = True
第二部分：
'''Demo'''
def Demo():
root.minsize(320, 420)
root.title('Calculator')
# 佈局
# --文本框
label = tkinter.Label(root, textvariable=CurrentShow, bg='black', anchor='e', bd=5, fg='white', font=('楷體', 20))
label.place(x=20, y=50, width=280, height=50)
# --第一行
# ----Memory clear
button1_1 = tkinter.Button(text='MC', bg='#666', bd=2, command=lambda:pressOperator('MC'))
button1_1.place(x=20, y=110, width=50, height=35)
# ----Memory read
button1_2 = tkinter.Button(text='MR', bg='#666', bd=2, command=lambda:pressOperator('MR'))
button1_2.place(x=77.5, y=110, width=50, height=35)
# ----Memory save
button1_3 = tkinter.Button(text='MS', bg='#666', bd=2, command=lambda:pressOperator('MS'))
button1_3.place(x=135, y=110, width=50, height=35)
# ----Memory +
button1_4 = tkinter.Button(text='M+', bg='#666', bd=2, command=lambda:pressOperator('M+'))
button1_4.place(x=192.5, y=110, width=50, height=35)
# ----Memory -
button1_5 = tkinter.Button(text='M-', bg='#666', bd=2, command=lambda:pressOperator('M-'))
button1_5.place(x=250, y=110, width=50, height=35)
# --第二行
# ----刪除單個數字
button2_1 = tkinter.Button(text='del', bg='#666', bd=2, command=lambda:delOne())
button2_1.place(x=20, y=155, width=50, height=35)
# ----清除當前顯示框內所有數字
button2_2 = tkinter.Button(text='CE', bg='#666', bd=2, command=lambda:clearCurrent())
button2_2.place(x=77.5, y=155, width=50, height=35)
# ----清零(相當於重啓)
button2_3 = tkinter.Button(text='C', bg='#666', bd=2, command=lambda:clearAll())
button2_3.place(x=135, y=155, width=50, height=35)
# ----取反
button2_4 = tkinter.Button(text='+/-', bg='#666', bd=2, command=lambda:pressOperator('+/-'))
button2_4.place(x=192.5, y=155, width=50, height=35)
# ----開根號
button2_5 = tkinter.Button(text='sqrt', bg='#666', bd=2, command=lambda:pressOperator('sqrt'))
button2_5.place(x=250, y=155, width=50, height=35)
# --第三行
# ----7
button3_1 = tkinter.Button(text='7', bg='#bbbbbb', bd=2, command=lambda:pressNumber('7'))
button3_1.place(x=20, y=200, width=50, height=35)
# ----8
button3_2 = tkinter.Button(text='8', bg='#bbbbbb', bd=2, command=lambda:pressNumber('8'))
button3_2.place(x=77.5, y=200, width=50, height=35)
# ----9
button3_3 = tkinter.Button(text='9', bg='#bbbbbb', bd=2, command=lambda:pressNumber('9'))
button3_3.place(x=135, y=200, width=50, height=35)
# ----除
button3_4 = tkinter.Button(text='/', bg='#708069', bd=2, command=lambda:pressOperator('/'))
button3_4.place(x=192.5, y=200, width=50, height=35)
# ----取餘
button3_5 = tkinter.Button(text='%', bg='#708069', bd=2, command=lambda:pressOperator('%'))
button3_5.place(x=250, y=200, width=50, height=35)
# --第四行
# ----4
button4_1 = tkinter.Button(text='4', bg='#bbbbbb', bd=2, command=lambda:pressNumber('4'))
button4_1.place(x=20, y=245, width=50, height=35)
# ----5
button4_2 = tkinter.Button(text='5', bg='#bbbbbb', bd=2, command=lambda:pressNumber('5'))
button4_2.place(x=77.5, y=245, width=50, height=35)
# ----6
button4_3 = tkinter.Button(text='6', bg='#bbbbbb', bd=2, command=lambda:pressNumber('6'))
button4_3.place(x=135, y=245, width=50, height=35)
# ----乘
button4_4 = tkinter.Button(text='*', bg='#708069', bd=2, command=lambda:pressOperator('*'))
button4_4.place(x=192.5, y=245, width=50, height=35)
# ----取導數
button4_5 = tkinter.Button(text='1/x', bg='#708069', bd=2, command=lambda:pressOperator('1/x'))
button4_5.place(x=250, y=245, width=50, height=35)
# --第五行
# ----3
button5_1 = tkinter.Button(text='3', bg='#bbbbbb', bd=2, command=lambda:pressNumber('3'))
button5_1.place(x=20, y=290, width=50, height=35)
# ----2
button5_2 = tkinter.Button(text='2', bg='#bbbbbb', bd=2, command=lambda:pressNumber('2'))
button5_2.place(x=77.5, y=290, width=50, height=35)
# ----1
button5_3 = tkinter.Button(text='1', bg='#bbbbbb', bd=2, command=lambda:pressNumber('1'))
button5_3.place(x=135, y=290, width=50, height=35)
# ----減
button5_4 = tkinter.Button(text='-', bg='#708069', bd=2, command=lambda:pressOperator('-'))
button5_4.place(x=192.5, y=290, width=50, height=35)
# ----等於
button5_5 = tkinter.Button(text='=', bg='#708069', bd=2, command=lambda:pressOperator('='))
button5_5.place(x=250, y=290, width=50, height=80)
# --第六行
# ----0
button6_1 = tkinter.Button(text='0', bg='#bbbbbb', bd=2, command=lambda:pressNumber('0'))
button6_1.place(x=20, y=335, width=107.5, height=35)
# ----小數點
button6_2 = tkinter.Button(text='.', bg='#bbbbbb', bd=2, command=lambda:pressDP())
button6_2.place(x=135, y=335, width=50, height=35)
# ----加
button6_3 = tkinter.Button(text='+', bg='#708069', bd=2, command=lambda:pressOperator('+'))
button6_3.place(x=192.5, y=335, width=50, height=35)
root.mainloop()
if __name__ == '__main__':
Demo()
好了，一個259行代碼的計算器就做好了，另外，這個計算器無需下載任何插件的，界面非常整潔，最後給大家奉上滑稽：
(網友：你這是什麼鬼？？？？)
對不起，搞錯了哈，重來重來。
最後給大家奉上全部代碼：
'''
Function:
tkinter計算器
Author:
Charlie
'''
import math
import tkinter
root = tkinter.Tk()
root.resizable(width=False, height=False)
'''hypeparameter'''
# 是否按下了運算符
IS_CALC = False
# 存儲數字
STORAGE = []
# 顯示框最多顯示多少個字符
MAXSHOWLEN = 18
# 當前顯示的數字
CurrentShow = tkinter.StringVar()
CurrentShow.set('0')
'''按下數字鍵(0-9)'''
def pressNumber(number):
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if CurrentShow.get() == '0':
CurrentShow.set(number)
else:
if len(CurrentShow.get()) < MAXSHOWLEN:
CurrentShow.set(CurrentShow.get() + number)
'''按下小數點'''
def pressDP():
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if len(CurrentShow.get().split('.')) == 1:
if len(CurrentShow.get()) < MAXSHOWLEN:
CurrentShow.set(CurrentShow.get() + '.')
'''清零'''
def clearAll():
global STORAGE
global IS_CALC
STORAGE.clear()
IS_CALC = False
CurrentShow.set('0')
'''清除當前顯示框內所有數字'''
def clearCurrent():
CurrentShow.set('0')
'''刪除顯示框內最後一個數字'''
def delOne():
global IS_CALC
if IS_CALC:
CurrentShow.set('0')
IS_CALC = False
if CurrentShow.get() != '0':
if len(CurrentShow.get()) > 1:
CurrentShow.set(CurrentShow.get()[:-1])
else:
CurrentShow.set('0')
'''計算答案修正'''
def modifyResult(result):
result = str(result)
if len(result) > MAXSHOWLEN:
if len(result.split('.')[0]) > MAXSHOWLEN:
result = 'Overflow'
else:
# 直接捨去不考慮四捨五入問題
result = result[:MAXSHOWLEN]
return result
'''按下運算符'''
def pressOperator(operator):
global STORAGE
global IS_CALC
if operator == '+/-':
if CurrentShow.get().startswith('-'):
CurrentShow.set(CurrentShow.get()[1:])
else:
CurrentShow.set('-'+CurrentShow.get())
elif operator == '1/x':
try:
result = 1 / float(CurrentShow.get())
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'sqrt':
try:
result = math.sqrt(float(CurrentShow.get()))
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'MC':
STORAGE.clear()
elif operator == 'MR':
if IS_CALC:
CurrentShow.set('0')
STORAGE.append(CurrentShow.get())
expression = ''.join(STORAGE)
try:
result = eval(expression)
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
IS_CALC = True
elif operator == 'MS':
STORAGE.clear()
STORAGE.append(CurrentShow.get())
elif operator == 'M+':
STORAGE.append(CurrentShow.get())
elif operator == 'M-':
if CurrentShow.get().startswith('-'):
STORAGE.append(CurrentShow.get())
else:
STORAGE.append('-' + CurrentShow.get())
elif operator in ['+', '-', '*', '/', '%']:
STORAGE.append(CurrentShow.get())
STORAGE.append(operator)
IS_CALC = True
elif operator == '=':
if IS_CALC:
CurrentShow.set('0')
STORAGE.append(CurrentShow.get())
expression = ''.join(STORAGE)
try:
result = eval(expression)
# 除以0的情況
except:
result = 'illegal operation'
result = modifyResult(result)
CurrentShow.set(result)
STORAGE.clear()
IS_CALC = True
'''Demo'''
def Demo():
root.minsize(320, 420)
root.title('Calculator')
# 佈局
# --文本框
label = tkinter.Label(root, textvariable=CurrentShow, bg='black', anchor='e', bd=5, fg='white', font=('楷體', 20))
label.place(x=20, y=50, width=280, height=50)
# --第一行
# ----Memory clear
button1_1 = tkinter.Button(text='MC', bg='#666', bd=2, command=lambda:pressOperator('MC'))
button1_1.place(x=20, y=110, width=50, height=35)
# ----Memory read
button1_2 = tkinter.Button(text='MR', bg='#666', bd=2, command=lambda:pressOperator('MR'))
button1_2.place(x=77.5, y=110, width=50, height=35)
# ----Memory save
button1_3 = tkinter.Button(text='MS', bg='#666', bd=2, command=lambda:pressOperator('MS'))
button1_3.place(x=135, y=110, width=50, height=35)
# ----Memory +
button1_4 = tkinter.Button(text='M+', bg='#666', bd=2, command=lambda:pressOperator('M+'))
button1_4.place(x=192.5, y=110, width=50, height=35)
# ----Memory -
button1_5 = tkinter.Button(text='M-', bg='#666', bd=2, command=lambda:pressOperator('M-'))
button1_5.place(x=250, y=110, width=50, height=35)
# --第二行
# ----刪除單個數字
button2_1 = tkinter.Button(text='del', bg='#666', bd=2, command=lambda:delOne())
button2_1.place(x=20, y=155, width=50, height=35)
# ----清除當前顯示框內所有數字
button2_2 = tkinter.Button(text='CE', bg='#666', bd=2, command=lambda:clearCurrent())
button2_2.place(x=77.5, y=155, width=50, height=35)
# ----清零(相當於重啓)
button2_3 = tkinter.Button(text='C', bg='#666', bd=2, command=lambda:clearAll())
button2_3.place(x=135, y=155, width=50, height=35)
# ----取反
button2_4 = tkinter.Button(text='+/-', bg='#666', bd=2, command=lambda:pressOperator('+/-'))
button2_4.place(x=192.5, y=155, width=50, height=35)
# ----開根號
button2_5 = tkinter.Button(text='sqrt', bg='#666', bd=2, command=lambda:pressOperator('sqrt'))
button2_5.place(x=250, y=155, width=50, height=35)
# --第三行
# ----7
button3_1 = tkinter.Button(text='7', bg='#bbbbbb', bd=2, command=lambda:pressNumber('7'))
button3_1.place(x=20, y=200, width=50, height=35)
# ----8
button3_2 = tkinter.Button(text='8', bg='#bbbbbb', bd=2, command=lambda:pressNumber('8'))
button3_2.place(x=77.5, y=200, width=50, height=35)
# ----9
button3_3 = tkinter.Button(text='9', bg='#bbbbbb', bd=2, command=lambda:pressNumber('9'))
button3_3.place(x=135, y=200, width=50, height=35)
# ----除
button3_4 = tkinter.Button(text='/', bg='#708069', bd=2, command=lambda:pressOperator('/'))
button3_4.place(x=192.5, y=200, width=50, height=35)
# ----取餘
button3_5 = tkinter.Button(text='%', bg='#708069', bd=2, command=lambda:pressOperator('%'))
button3_5.place(x=250, y=200, width=50, height=35)
# --第四行
# ----4
button4_1 = tkinter.Button(text='4', bg='#bbbbbb', bd=2, command=lambda:pressNumber('4'))
button4_1.place(x=20, y=245, width=50, height=35)
# ----5
button4_2 = tkinter.Button(text='5', bg='#bbbbbb', bd=2, command=lambda:pressNumber('5'))
button4_2.place(x=77.5, y=245, width=50, height=35)
# ----6
button4_3 = tkinter.Button(text='6', bg='#bbbbbb', bd=2, command=lambda:pressNumber('6'))
button4_3.place(x=135, y=245, width=50, height=35)
# ----乘
button4_4 = tkinter.Button(text='*', bg='#708069', bd=2, command=lambda:pressOperator('*'))
button4_4.place(x=192.5, y=245, width=50, height=35)
# ----取導數
button4_5 = tkinter.Button(text='1/x', bg='#708069', bd=2, command=lambda:pressOperator('1/x'))
button4_5.place(x=250, y=245, width=50, height=35)
# --第五行
# ----3
button5_1 = tkinter.Button(text='3', bg='#bbbbbb', bd=2, command=lambda:pressNumber('3'))
button5_1.place(x=20, y=290, width=50, height=35)
# ----2
button5_2 = tkinter.Button(text='2', bg='#bbbbbb', bd=2, command=lambda:pressNumber('2'))
button5_2.place(x=77.5, y=290, width=50, height=35)
# ----1
button5_3 = tkinter.Button(text='1', bg='#bbbbbb', bd=2, command=lambda:pressNumber('1'))
button5_3.place(x=135, y=290, width=50, height=35)
# ----減
button5_4 = tkinter.Button(text='-', bg='#708069', bd=2, command=lambda:pressOperator('-'))
button5_4.place(x=192.5, y=290, width=50, height=35)
# ----等於
button5_5 = tkinter.Button(text='=', bg='#708069', bd=2, command=lambda:pressOperator('='))
button5_5.place(x=250, y=290, width=50, height=80)
# --第六行
# ----0
button6_1 = tkinter.Button(text='0', bg='#bbbbbb', bd=2, command=lambda:pressNumber('0'))
button6_1.place(x=20, y=335, width=107.5, height=35)
# ----小數點
button6_2 = tkinter.Button(text='.', bg='#bbbbbb', bd=2, command=lambda:pressDP())
button6_2.place(x=135, y=335, width=50, height=35)
# ----加
button6_3 = tkinter.Button(text='+', bg='#708069', bd=2, command=lambda:pressOperator('+'))
button6_3.place(x=192.5, y=335, width=50, height=35)
root.mainloop()
if __name__ == '__main__':
Demo()
好了，最後，給個關注唄，不要讓我7天的成果在你的收藏裏吃灰啊！