正则表达式计算 origin = "1

#!/usr/bin/env python
import re
def f1(arg):

    return 1

origin = "1 - 2 * ( ( 60 - 30 + ( -40.0 / 5 ) * ( 9 - 2 * 5 / 3 + 7 / 3 * 99 / 4 * 2998 + 10 * 568 / 14 )) - ( - 4 * 3 ) / ( 16 - 3 * 2))"
print(eval(origin))
while True:
    print(origin)
    ret = re.split("(([^()]+))", origin,1)
    if len(ret) == 3:
        before = ret[0]
        content = ret[1]
        after = ret[2]
        r = f1(content)
        new_str = before + str(r) + after
        origin = new_str
    else:
        final = f1(origin)
        print(final)
        break