python跳回循环开始位置_如何回到python中循环的开始？

我的代码：b="y"

ol=[]

#operations list

OPERATIONS = ["-", "+", "*", "/"]

op = input ("Please enter your first calculation\n")

while b=="y":

ops = op.split(" ")

#add arguments to list

for x in ops:

ol+=x

if ol[1] in OPERATIONS:

#make sure operator is an operator

print()

#make sure not dividing by zero

if ol[1] == "/" and ol[2] == "0":

print("Error")

b = input("Would you like to do another calculation (y/n)?\n")

if b == "y":

op = input("Please enter your calculation:\n")

continue

else:

break

else:

n1 = float(ol[0])

n2 = float(ol[2])

#calculations done here

if ol[1] == '-':

calc = n1-n2

if ol[1] == '+':

calc = n1+n2

if ol[1] == '/':

calc = n1/n2

if ol[1] == '*':

calc = n1*n2

print("Result: " + str(calc))

b = input("Would you like to do another calculation (y/n)?\n")

if b == "y":

op = input("Please enter your calculation:\n")

continue

else:

break

else:

print("Error")

如何确保程序将新操作带到循环的开始，而不是继续打印原始计算？在

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