
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Given a partial main.py and PlaneQueue class in PlaneQueue.py, write the push() and pop() methods for PlaneQueue. Then complete main.py to read in whether flights are arriving or have landed at an airport.
- An "arriving" flight is pushed onto the queue.
- A "landed" flight is popped from the front of the queue.
Output the queue after each plane is pushed or popped. Entering -1 exits the program.

Transcribed Image Text:10.7 Air-traffic control (queue using a linked list)
Given a partial main.py and PlaneQueue class in PlaneQueue.py, write the push() and pop() methods for PlaneQueue. Then complete
main.py to read in whether flights are arriving or have landed at an airport.
An 'arriving" flight is pushed onto the queue.
A "landed" flight is popped from the front of the queue.
Output the queue after each plane is pushed or popped. Entering -1 exits the program.
Ex If the input is:
arriving AA213
arriving DAL23
arriving UA628
landed
-1
the output is:
Air-traffic control queue
Next to land: AA213
Air-traffic control queue
Next to land: AA213
Arriving flights:
DAL23
Air-traffic control queue
Next to land: AA213
Arriving flights:
DAL23
UA628
AA213 has landed.
Air-traffic control queue
Next to land: DAL23
Arriving flights:
UA628
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