#計算一個表達(dá)式的時候，首先肯定是先算括號里面的，再算乘除法，后算加減法
import re
# 1.去括號
def remove_kuohao(expression):
  '''
  這是一個去除括號的函數(shù)
  :param expression: 傳進(jìn)來的表達(dá)式
  :return: 計算后的結(jié)果
  '''
  while True:
    ret = re.search(r'\([^(]*?\)',expression) #先利用正則匹配到式子里面的括號
    if ret: #如果有括號
      re_expression = ret.group() #先把找到的括號group()一下得到
      # print(re_expression)
      res = jianhua(re_expression.strip('()')) #括號里面有*/-+都不一定，就又定義了一個簡化這個表達(dá)式的函數(shù)
      # 如果是乘法就執(zhí)行乘法運算，如果是除法運算就執(zhí)行除法等，這樣的話就直接調(diào)用jianhua這個函數(shù)了，當(dāng)然這個式子
      # 有括號，順便把括號也去了，直接計算去掉括號后的式子
      expression = expression.replace(re_expression,str(res)) #把計算出來的結(jié)果放回去：就是把原來的括號里的表達(dá)式
                                  # 替換成現(xiàn)在計算的結(jié)果
      # print(expression)
      continue
    break
  res = jianhua(expression)
  return res
#簡化算法
def jianhua(re_expression):
  while True:
    # 匹配乘除法
    ret = re.search(r'\d+\.*?\d*[*/]\-?\d+\.?\d*', re_expression) #利用正則匹配乘除法
    if ret: # 如果匹配到有*或/就執(zhí)行下面的代碼
      chengchu_expression = ret.group() #就先group一下得到有乘除法的表達(dá)式
      res = chengchu(chengchu_expression) #調(diào)用乘除法的函數(shù)計算
      re_expression = re_expression.replace(chengchu_expression, str(res)) #吧有乘除法的表達(dá)式和計算出來的結(jié)果替換
      re_expression =chulifuhao(re_expression) #在調(diào)用處理符號的函數(shù)
      # print(re_expression)
      continue
    break
  # 匹配加減法
  num = re.findall(r'[+-]?\d+\.?\d*', re_expression)#在沒有乘除法的時候，就讓匹配加減法，
  if len(num) > 1: #如果匹配到的表達(dá)式的長度大于1，不過是加法還是減法，都讓計算加法。因為float啥結(jié)果就是啥
    mynum = 0
    for i in num:
      mynum += float(i)
    return mynum
  else:
    return num[0]
# 3.計算兩個數(shù)的+-*/
def chengchu(expression):
  if '*' in expression:
    x,y = expression.split('*')
    return float(x)*float(y) #返回乘法運算的結(jié)果 ，讓res接收
  if '/' in expression:
    x, y = expression.split('/')
    return float(x)/float(y)  #返回乘法運算的結(jié)果 ，讓res接收

def chulifuhao(expression):
  if '--' in expression:
    expression = expression.replace('--','+')
  if '++' in expression:
    expression = expression.replace('++','+')
  if '+-' in expression:
    expression = expression.replace('+-','-')
  if '-+' in expression:
    expression = expression.replace('-+','-')
  return expression #返回結(jié)果

cmd = input('請輸入你要計算的表達(dá)式：>>')
# s = '1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4*3)/ (16-3*2) )'
new_s = cmd.replace(' ', '') #先將所有的空格去了
# print(new_s)
ret = remove_kuohao(new_s) #調(diào)用去除括號的函數(shù)，進(jìn)行下一步操作
print(ret)

import re
from functools import reduce
from tkinter import *
'''處理特殊－號運算'''


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(">>>>>>>>>>>>>>減號[%s]運算結(jié)果:" % expresstion, res)
  return res

'''reduce()對sequence連續(xù)使用function, 如果不給出initial, 則第一次調(diào)用傳遞sequence的兩個元素,
以后把前一次調(diào)用的結(jié)果和sequence的下一個元素傳遞給function'''

'''處理雙運算符號'''


def del_duplicates(expresstion):
  expresstion = expresstion.replace("++", "+")
  expresstion = expresstion.replace("--", "-")
  expresstion = expresstion.replace("+-", "-")
  expresstion = expresstion.replace("--", "+")
  expresstion = expresstion.replace('- -', "+")
  return expresstion
'''＊／運算函數(shù)'''
def mutiply_dividend(expresstion):
  calc_list = re.split("[*/]", expresstion) # 用＊ or /分割公式
  operators = re.findall("[*/]", expresstion) # 找出所有＊和／號
  res = None
  for 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]運算結(jié)果=" % expresstion, res
  # final_result.insert(END, procession0) # 插入窗體
  print(procession0)
  return res

'''處理運算符號順序混亂情況'''
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_dividend

def 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()
'''運算除了（）的公式＋－＊／'''
def figure_up(expresstion):
  expresstion = expresstion.strip("()") # 去掉外面括號
  expresstion = del_duplicates(expresstion) # 去掉重復(fù)＋－號
  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_res
  # print(multiply_and_dividend, plus_and_minus_operators) # 計算
  final_res = None
  for 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]計算結(jié)果:' % expresstion, final_res
    # final_result.insert(END, procession) # 插入窗體
    # print(procession)
  return final_res
"""主函數(shù)：運算邏輯：先計算拓號里的值,算出來后再算乘除,再算加減"""
def calculate():
  expresstion = expresstions.get() # 獲取輸入框值
  flage = True
  calculate_res = None # 初始化計算結(jié)果為None
  while flage:
    m = re.search("\([^()]*\)", expresstion) # 先找最里層的（）
  # pattern = re.compile(r"\([^()]*\)")
  # m = pattern.match(expresstion)
    if m:
      sub_res = figure_up(m.group()) # 運算（）里的公式
      expresstion = expresstion.replace(m.group(), str(sub_res)) # 運算完畢把結(jié)果替換掉公式
    else:
      # print('---------------括號已經(jīng)計算完畢--------------')
      procession1 = "最終計算結(jié)果:%s\n"%figure_up(expresstion)
      print(procession1)
      final_result.insert(END, procession1) # 插入窗體
      # print('\033[31m最終計算結(jié)果:', figure_up(expresstion))
      flage = False

if __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() ###創(chuàng)建窗體
  window.title('計算器') ###命名窗體
  frame1 = Frame(window) ###框架1
  frame1.pack() ###放置
  frame2 = Frame(window) ###框架2
  frame2.pack() ###放置
  lable = Label(frame1, text="請輸入公式：") ###文字標(biāo)簽
  lable.pack()
  expresstions = StringVar() ###輸入框?qū)傩裕址?
  entryname = Entry(frame1, textvariable=expresstions) ###文本輸入框
  bt_get_expresstions = Button(frame1, text="提交", command=calculate) ###按鈕掛件
  bt_get_expresstions.pack()
  entryname.pack()
  lable.grid_slaves(row=1,column=1)
  entryname.grid_slaves(row=1,column=1)
  bt_get_expresstions.grid_slaves(row=1,column=3)
  final_result = Text(frame2) ###計算結(jié)果顯示框
  final_result.tag_config("here", background="yellow", foreground="blue")
  final_result.pack()
  window.mainloop() ###事件循環(huán)