Final answer:
The code in question demonstrates a Python function printing a variable's value without altering it. The output will show '500' twice, once from inside the function, and once from the main script.
Step-by-step explanation:
The student's question pertains to a simple Python function and the behavior of variables when a function is called. The provided code appears to define a function named huston that prints the value of the variable passed to it. After defining a variable z with a value of 500 in the main part of the script, the script prints z, calls the huston function with z as an argument, and then prints z again.
When the huston function is called with the argument z, it will print the value of z, which is 500. The value of z is not changed by the function, so when z is printed again outside the function, it will still be 500.