一个简易计算器代码

import re
def basic_cal(cal_list):
    def del_ex(temp,ind):
        cal_list[ind-1]=temp
        del cal_list[ind],cal_list[ind]
    def mul_div(c_list):
        while True:
            for index,args in enumerate(c_list):
                if args=="*":
                    args_temp=float(c_list[index-1])*float(c_list[index+1])
                    del_ex(args_temp,index)
                    break
                elif args=="/":
                    args_temp=float(c_list[index-1])/float(c_list[index+1])
                    del_ex(args_temp,index)
                    break
            if "*" not in c_list and "/" not in c_list:
                return c_list
    def plu_min(c_list):
        while True:
            for index,args in enumerate(c_list):
                if args=="+":
                    args_temp=float(c_list[index-1])+float(c_list[index+1])
                    del_ex(args_temp,index)
                    break
                elif args=="-":
                    args_temp=float(c_list[index-1])-float(c_list[index+1])
                    del_ex(args_temp,index)
                    break
            if "+" not in c_list and "-" not in c_list:
                return c_list
    if cal_list[0]=="-":
        cal_list[0]+=cal_list[1]
        del cal_list[1]
    cal_list=mul_div(cal_list)
    cal_list=plu_min(cal_list)
    return cal_list


y="((2+3*5)-4/25*(-25-36))/5*23+22551*(5/2+6.56*5.25)/5*25-(88+22)"
y1=y
while  True:
        if "(" in y:
            y_bra=re.search(r"\([\d\+-/\*]+\)",y).group()
        else:
            y_bra=y
        if re.search("[\+\*/-]-[\d\.]+",y_bra):
           s_min=re.search("[\+\*/-]-[\d\.]+",y_bra).group()
           y_bra=y_bra.replace(s_min,s_min[0]+"000")
           y=y.replace(s_min,s_min[0]+"000")
           y_list=re.findall("[\d\.]+|\+|-|/|\*",y_bra)
           y_list[y_list.index("000")]=s_min[1:len(s_min)]
        else:
           y_list=re.findall("[\d\.]+|\+|-|/|\*",y_bra)
        y_list=basic_cal(y_list)
        y=y.replace(y_bra,str(y_list[0]))
        if y==str(y_list[0]):
            break
print("the answer is",y_list,eval(y1))