calc v0.1

calc.py

'''
 1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4*3)/ (16-3*2) )
'''

import re
calcStr = "1 - 2 * ( (60-30 +(-40/5) * (9-2*5/3 + 7 /3*99/4*2998 +10 * 568/14 )) - (-4*3)/ (16-3*2) )"
calcStr = re.sub("\ ","",calcStr)   #   清除输入中的空格
sepStr = ""

def strExecute(inStr):              #查找字符串中的最高优先级算式，并返回字符串
    # print(inStr)
    outStr = ""
    outStr = re.search("\([\(\)\+\-\*/\d]+",inStr)

    if ((outStr is not None) and ("(" in inStr)):
        outStr = strExecute(outStr.group(0)[1:])
        # return outStr
        return re.search("[^\(\)]*",outStr).group(0)
    else:
        # return inStr
        return re.search("[^\(\)]*",inStr).group(0)

sepStr = strExecute(calcStr)
print("[Final]:",sepStr)