In python>>> prior_to([1, 2, 3, 4, 5, 6, 7, 8, 3], 3)[2, 8]>>> prior_to(['Please', 'run', 'the', 'drinks', 'inside.', 'Then', 'cover', 'the', 'patio,', 'you', 'have', 'exposed', 'the', 'fresh', 'paint', 'to', 'rain.'], 'the')['run', 'cover', 'exposed']>>> prior_to([0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0], 1)[0, 1, 1, 1, 1, 0, 0, 0] ### Secret Message Retrieval ProtocolYou’re part of a secret organization that uses a special protocol to send hidden information amongst seemingly innocuous data. Specifically, each week you’re given a key value to look for. Wherever that key value appears in any list, the value that comes right before it within the list is part of the hidden message you need to retrieve.### TaskWrite a function `prior_to(data, key)` that takes in a list `data`, along with an element `key` that appears in that list, possibly multiple times. The function should return a list of all elements that appear immediately before the key within the data list.### AssumptionsYou can assume that the key will always appear at least once within the list and will never appear in index 0.

In this question we have to write a python code in which we have to create a prior_to function and…

Answered: You're part of a secret organization…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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In python >>> prior_to([1, 2, 3, 4, 5, 6, 7, 8, 3], 3) [2, 8] >>> prior_to(['Please', 'run', 'the', 'drinks', 'inside.', 'Then', 'cover', 'the', 'patio,', 'you', 'have', 'exposed', 'the', 'fresh', 'paint', 'to', 'rain.'], 'the') ['run', 'cover', 'exposed'] >>> prior_to([0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0], 1) [0, 1, 1, 1, 1, 0, 0, 0]

### Secret Message Retrieval Protocol

You’re part of a secret organization that uses a special protocol to send hidden information amongst seemingly innocuous data. Specifically, each week you’re given a key value to look for. Wherever that key value appears in any list, the value that comes right before it within the list is part of the hidden message you need to retrieve.

### Task

Write a function `prior_to(data, key)` that takes in a list `data`, along with an element `key` that appears in that list, possibly multiple times. The function should return a list of all elements that appear immediately before the key within the data list.

### Assumptions

You can assume that the key will always appear at least once within the list and will never appear in index 0.

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