Python 程序报错：IndexError: deque index out of range 的解决方法

The error you are encountering is caused by an index out of range error in the 'calculate' function. Specifically, the error occurs when trying to access the last element of the 'satck_int' deque.

To solve this issue, you should add a check to ensure that 'satck_int' is not empty before trying to access its elements. Here's the modified 'calculate' function:

def calculate(t1):
    if len(satck_int) < 2:
        print('Error: Not enough operands')
        return

    d1 = satck_int.pop()
    d2 = satck_int.pop()
    satck_int.append(count(d1, d2, t1))
    stack.pop()

This check ensures that there are at least two elements in 'satck_int' before performing the calculation. If there are not enough operands, it will print an error message and return.

Additionally, in your code, there is a typo in the 'getchar' function. You are using 'input' instead of 'print' to prompt the user to input the rules. To fix this, change the line 'input("scan your rules(change id to i and end with stop)")' to 'print("scan your rules(change id to i and end with stop)")'.

After making these modifications, your code should run without any errors.