Infinite Loop in food_ordering_system.py

[slayer321]

There is an error in the dequeue method in the Queue class as when I'm running this program
food_ordering_system.py . I'm getting an infinite loop

Placing order for: samosa
Placing order for:Now serving:  pizza
 pasta
Placing order for: biryani
Placing order for: burger
Now serving:  samosa
Now serving:  pasta
Now serving:  biryani
Now serving:  burger
Queue is empty
Now serving:  None
Queue is empty
Now serving:  None
Queue is empty
Now serving:  None
Queue is empty
Now serving:  None
Queue is empty
Now serving:  None
Queue is empty
Now serving:  None 

and it goes on
I think this error can be solved by using the try and except block
I'm new to open source and trying to make my contribution.
I will work on this issue.
can you guide me?

[slayer321]

got the solution
I'm going to PR
please do merge it