1 #!usr/bin/env/ python
  2 # -*- coding:utf-8 -*-
  3 # Author: XiaoFeng
  4 import re
  5 
  6 
  7 a = '1 - 2 * ( ( 6 0 -3 0  +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4*3)/ (16-3*2) )'
  8 a_new = re.sub(" ", "", a)
  9 print(a_new)
 10 ret = re.findall(r"\([^()]*\)", a_new)
 11 while ret:
 12     ret = re.findall(r"\([^()]*\)", a_new)
 13     print(ret)
 14     for element in ret:
 15         formula = element
 16         formula = formula.replace("(", "")
 17         formula = formula.replace(")", "")
 18         # print(formula)
 19         for i in formula:
 20             if "--" in formula:
 21                 formula = formula.replace("--", "+")
 22             elif "*" == i:
 23                 handle = re.search(r"[-+]?\d+\.?\d*\*[-+]?\d+\.?\d*", formula)
 24                 if handle:
 25                     handle_list = handle.group()
 26                 else:
 27                     continue
 28                 handle_a, handle_b = re.findall(r"[-+]?\d+\.?\d*", handle_list)
 29                 if "." in handle_a or "." in handle_b:
 30                     result = float(handle_a) * float(handle_b)
 31                     if result >= 0:
 32                         result = "+" + str(result)
 33                     result = str(result)
 34                 else:
 35                     result = int(handle_a) * int(handle_b)
 36                     if result >= 0:
 37                         result = "+" + str(result)
 38                     result = str(result)
 39                 formula = formula.replace(handle_list, result)
 40                 # print(formula)
 41             elif "/" == i:
 42                 handle = re.search(r"[-+]?\d+\.?\d*/[-+]?\d+\.?\d*", formula)
 43                 if handle:
 44                     handle_list = handle.group()
 45                 else:
 46                     continue
 47                 handle_a, handle_b = re.findall(r"[-+]?\d+\.?\d*", handle_list)
 48                 if "." in handle_a or "." in handle_b:
 49                     result = float(handle_a) / float(handle_b)
 50                     if result >= 0:
 51                         result = "+" + str(result)
 52                     result = str(result)
 53                 else:
 54                     result = int(handle_a) / int(handle_b)
 55                     if result >= 0:
 56                         result = "+" + str(result)
 57                     result = str(result)
 58                 formula = formula.replace(handle_list, result)
 59                 # print(formula)
 60         for i in formula:
 61             if "--" in formula:
 62                 formula = formula.replace("--", "+")
 63             elif "+" == i:
 64                 handle = re.search(r"[-+]?\d+\.?\d*\+[-+]?\d+\.?\d*", formula)
 65                 if handle:
 66                     handle_list = handle.group()
 67                 else:
 68                     continue
 69                 handle_a, handle_b = re.findall(r"[-+]?\d+\.?\d*", handle_list)
 70                 if "." in handle_a or "." in handle_b:
 71                     result = float(handle_a) + float(handle_b)
 72                     if result >= 0:
 73                         result = "+" + str(result)
 74                     result = str(result)
 75                 else:
 76                     result = int(handle_a) + int(handle_b)
 77                     if result >= 0:
 78                         result = "+" + str(result)
 79                     result = str(result)
 80                 formula = formula.replace(handle_list, result)
 81                 # print(formula)
 82             elif "-" == i:
 83                 handle = re.search(r"[-+]?\d+\.?\d*-[-+]?\d+\.?\d*", formula)
 84                 if handle:
 85                     handle_list = handle.group()
 86                 else:
 87                     continue
 88                 handle_a, handle_b = re.findall(r"[-+]?\d+\.?\d*", handle_list)
 89                 if "." in handle_a or "." in handle_b:
 90                     result = float(handle_a) + float(handle_b)
 91                     if result >= 0:
 92                         result = "+" + str(result)
 93                     result = str(result)
 94                 else:
 95                     result = int(handle_a) + int(handle_b)
 96                     if result >= 0:
 97                         result = "+" + str(result)
 98                     result = str(result)
 99                 formula = formula.replace(handle_list, result)
100                 # print(formula)
101         # print(formula)
102         # print(element)
103         a_new = a_new.replace(element, formula)
104         # print(a_new)
105     print("------------")
106 print(a_new)
107 formula = a_new
108 for i in formula:
109     if "--" in formula:
110         formula = formula.replace("--", "+")
111     elif "*" == i:
112         handle = re.search(r"[-+]?\d+\.?\d*\*[-+]?\d+\.?\d*", formula)
113         if handle:
114             handle_list = handle.group()
115         else:
116             continue
117         handle_a, handle_b = re.findall(r"[-+]?\d+\.?\d*", handle_list)
118         if "." in handle_a or "." in handle_b:
119             result = float(handle_a) * float(handle_b)
120             if result >= 0:
121                 result = "+" + str(result)
122             result = str(result)
123         else:
124             result = int(handle_a) * int(handle_b)
125             if result >= 0:
126                 result = "+" + str(result)
127             result = str(result)
128         formula = formula.replace(handle_list, result)
129         print(formula)
130     elif "/" == i:
131         handle = re.search(r"[-+]?\d+\.?\d*/[-+]?\d+\.?\d*", formula)
132         if handle:
133             handle_list = handle.group()
134         else:
135             continue
136         handle_a, handle_b = re.findall(r"[-+]?\d+\.?\d*", handle_list)
137         if "." in handle_a or "." in handle_b:
138             result = float(handle_a) / float(handle_b)
139             if result >= 0:
140                 result = "+" + str(result)
141             result = str(result)
142         else:
143             result = int(handle_a) / int(handle_b)
144             if result >= 0:
145                 result = "+" + str(result)
146             result = str(result)
147         formula = formula.replace(handle_list, result)
148         print(formula)
149 print("=========")
150 for i in formula:
151     if "--" in formula:
152         formula = formula.replace("--", "+")
153     elif "+" == i:
154         handle = re.search(r"[-+]?\d+\.?\d*\+[-+]?\d+\.?\d*", formula)
155         if handle:
156             handle_list = handle.group()
157         else:
158             continue
159         handle_a, handle_b = re.findall(r"[-+]?\d+\.?\d*", handle_list)
160         if "." in handle_a or "." in handle_b:
161             result = float(handle_a) + float(handle_b)
162             if result >= 0:
163                 result = "+" + str(result)
164             result = str(result)
165         else:
166             result = int(handle_a) + int(handle_b)
167             if result >= 0:
168                 result = "+" + str(result)
169             result = str(result)
170         formula = formula.replace(handle_list, result)
171         print(formula)
172     elif "-" == i:
173         handle = re.search(r"[-+]?\d+\.?\d*-[-+]?\d+\.?\d*", formula)
174         if handle:
175             handle_list = handle.group()
176         else:
177             continue
178         handle_a, handle_b = re.findall(r"[-+]?\d+\.?\d*", handle_list)
179         if "." in handle_a or "." in handle_b:
180             result = float(handle_a) + float(handle_b)
181             if result >= 0:
182                 result = "+" + str(result)
183             result = str(result)
184         else:
185             result = int(handle_a) + int(handle_b)
186             if result >= 0:
187                 result = "+" + str(result)
188             result = str(result)
189         formula = formula.replace(handle_list, result)
190         print(formula)