1 import re
2
3 num_one = '(98798465*5465+4654-5464*45616846+84654)'
4 print(eval(num_one))
5
6 total = 0
7 print(num_one)
8 while True:
9 try:
10 a = re.search('\((\-)(\d+)', num_one)
11 if a:
12 num_one = num_one.replace(a.group(1), '', 1)
13 num_one = num_one.replace(')', '')
14 num_one = num_one + str(-2 * int(a.group(2))) + ')'
15 print(num_one)
16 first = re.search('[*|/]', num_one)
17 print(first.group())
18 try:
19 if first.group() == '*':
20 num1 = re.findall('(\d+)\*(\d+)', num_one)
21 total1 = int(num1[0][0]) * int(num1[0][1])
22 # total1 = int(num1[0][0]) * int(num1[0][1])
23 total += total1
24 num_one = re.sub('\d+\*\d+', str(total1), num_one, 1)
25 print(num_one, '11111')
26 elif first.group() == '/':
27 num1 = re.findall('(\d+)/(\d+)', num_one)
28 total1 = int(num1[0][0]) / int(num1[0][1])
29 total += total1
30 num_one = re.sub('\d+\/\d+', str(total1), num_one, 1)
31 print(num_one)
32 except Exception as f:
33 break
34 except Exception as d:
35 break
36 while True:
37 try:
38 first = re.search('\d+([+|-])', num_one)
39 print(first.group(1))
40 try:
41 if first.group(1) == '+':
42 num1 = re.findall('(\d+)\+(\d+)', num_one)
43 total1 = int(num1[0][0]) + int(num1[0][1])
44 # total1 = int(num1[0][0]) * int(num1[0][1])
45 total += total1
46 num_one = re.sub('\d+\+\d+', str(total1), num_one, 1)
47 print(num_one, '222222')
48 elif first.group(1) == '-':
49 num1 = re.findall('(\d+)\-(\d+)', num_one)
50 total1 = int(num1[0][0]) - int(num1[0][1])
51 total += total1
52 if total1 < 0 and len(re.findall('\d+', num_one)) > 2:
53 num_one = re.sub('\d+\-\d+', str(abs(total1)), num_one, 1)
54 num_one = num_one.replace(')', '')
55 num_one = num_one + str(total1 * 2) + ')'
56 elif total1 < 0 and len(re.findall('\d+', num_one)) <= 2:
57 num_one = str(total1)
58 break
59 else:
60 num_one = re.sub('\d+\-\d+', str(total1), num_one, 1)
61 print(num_one, '33333')
62 except Exception as f:
63 break
64 except Exception as d:
65 break
66 num_one = re.sub('[()]', '', num_one)
67 print(num_one)
68 输出：
69 290683253989
70 290683253989
