Encapsulation and Word Reversal | Dataford Interview Questions

Alarm alert messages may contain leading, trailing, or repeated whitespace. Implement an encapsulated function that returns the words in reverse order, separated by exactly one space. Word content, including punctuation, must remain unchanged.

A word is any maximal sequence of non-whitespace characters. The output must not contain leading or trailing whitespace. For an input containing only whitespace, return an empty string.

Formal Specification

Input: A string message containing zero or more printable characters and whitespace.
Output: A string containing the input words in reverse order, joined by one space.
The function must not modify the input string.

Constraints

0 <= len(message) <= 10^5
Words may contain punctuation or digits
Whitespace may include spaces, tabs, and newline characters
The input string must not be modified

Function Signature

def reverse_words(message):

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