定义一个函数，该函数接受任何整数数量的参数，并返回它们的平均值。
def calculate_average(*args):
     # TODO: Calculate the average of args
     pass
Here's the updated code to calculate the average of the passed arguments:

```
def calculate_average(*args):
    if len(args) == 0:
        return None
    return sum(args) / len(args)
```

This function first checks if there are any arguments passed. If none, it returns None. Otherwise, it computes the sum of all the arguments and divides it by the total number of arguments to get the average.