#!/usr/bin/env python3
#antuor:Alanimport  re
from functools import reduce
from tkinter import *'''处理特殊－号运算'''
def minus_operation(expresstion):minus_operators = re.split("-",expresstion)calc_list = re.findall("[0-9]",expresstion)if minus_operators[0] =="":calc_list[0] = '-%s' % calc_list[0]res = reduce(lambda x,y:float(x)-float(y),calc_list)print(">>>>>>>>>>>>>>减号[%s]运算结果:" % expresstion,res)return res'''reduce()对sequence连续使用function, 如果不给出initial, 则第一次调用传递sequence的两个元素,
以后把前一次调用的结果和sequence的下一个元素传递给function''''''处理双运算符号'''
def del_duplicates(expresstion):expresstion = expresstion.replace("++","+")expresstion = expresstion.replace("--","-")expresstion = expresstion.replace("+-","-")expresstion = expresstion.replace("--","+")expresstion = expresstion.replace('- -',"+")ereturn expresstion'''＊／运算函数'''
def mutiply_dividend(expresstion):calc_list = re.split("[*/]",expresstion)         #用＊ or /分割公式operators = re.findall("[*/]",expresstion)       #找出所有＊和／号res = Nonefor index,i in enumerate(calc_list):if res:if operators[index-1] =='*':res *= float(i)elif operators[index-1] =='/':res /=float(i)else :res = float(i)procession0 = "[%s]运算结果=" % expresstion,resfinal_result.insert(END,procession0)        #插入窗体print(procession0)return res'''处理运算符号顺序混乱情况'''
def special_features(plus_and_minus_operators,multiply_and_dividend):for index,i  in enumerate(multiply_and_dividend):i = i.strip()if i.endswith("*") or i.endswith("/"):multiply_and_dividend[index] = multiply_and_dividend[index] + plus_and_minus_operators[index] + multiply_and_dividend[index+1]del multiply_and_dividend[index+1]del plus_and_minus_operators[index]return plus_and_minus_operators,multiply_and_dividenddef minus_special(operator_list,calc_list):for index,i in enumerate(calc_list):if i =='':calc_list[index+1] = i + calc_list[index+1].strip()'''运算除了（）的公式＋－＊／'''
def figure_up(expresstion):expresstion = expresstion.strip("()")       #去掉外面括号expresstion = del_duplicates(expresstion)   #去掉重复＋－号plus_and_minus_operators = re.findall("[+-]",expresstion)multiply_and_dividend = re.split("[+-]",expresstion)if len(multiply_and_dividend[0].strip()) ==0:multiply_and_dividend[1] = plus_and_minus_operators[0] + multiply_and_dividend[1]del multiply_and_dividend[0]del plus_and_minus_operators[0]plus_and_minus_operators,multiply_and_dividend = special_features(plus_and_minus_operators,multiply_and_dividend)for index,i in enumerate(multiply_and_dividend):if re.search("[*/]",i):sub_res = mutiply_dividend(i)multiply_and_dividend[index] = sub_resprint(multiply_and_dividend,plus_and_minus_operators)    #计算final_res = Nonefor index,item in enumerate(multiply_and_dividend):if final_res:if plus_and_minus_operators[index-1] == '+':final_res += float(item)elif plus_and_minus_operators[index-1] == '-':final_res -= float(item)else:final_res = float(item)procession = '[%s]计算结果:' % expresstion,final_resfinal_result.insert(END,procession)        #插入窗体print(procession)return final_res"""主函数：运算逻辑：先计算拓号里的值,算出来后再算乘除,再算加减"""
def calculate():expresstion = expresstions.get()                  #获取输入框值flage = Truecalculate_res = None                              #初始化计算结果为Nonewhile flage:m = re.search("\([^()]*\)",expresstion)       #先找最里层的（）# pattern = re.compile(r"\([^()]*\)")# m = pattern.match(expresstion)if m:sub_res = figure_up(m.group())            #运算（）里的公式expresstion = expresstion.replace(m.group(),str(sub_res))    #运算完毕把结果替换掉公式else:print('---------------括号已经计算完毕--------------')procession1 = "最终计算结果:",figure_up(expresstion)final_result.insert(END,procession1)      #插入窗体print('\033[31m最终计算结果:',figure_up(expresstion))flage = Falseif __name__=="__main__":# res = calculate("1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4*3)/ (16-3*2) )")window = Tk()                 ###创建窗体window.title('计算器')        ###命名窗体frame1 = Frame(window)       ###框架1frame1.pack()                ###放置frame2 = Frame(window)       ###框架2frame2.pack()                ###放置lable = Label(frame1,text = "请输入公式：")   ###文字标签lable.pack()expresstions = StringVar()    ###输入框属性，字符串entryname = Entry(frame1,textvariable = expresstions)  ###文本输入框bt_get_expresstions = Button(frame1,text = "提交",command = calculate)  ###按钮挂件bt_get_expresstions.pack()entryname.pack()lable.grid(row =1,column =1)    ###位置entryname.grid(row=1,column =2)bt_get_expresstions.grid(row =1,column =3)final_result = Text(frame2)    ###计算结果显示框final_result.tag_config("here", background="yellow", foreground="blue")final_result.pack()window.mainloop()             ###事件循环