Reverse Words in Python

In this assignment, you'll design and implement one of the string manipulation functions that is commonly asked during interviews.

Exercise

• Design and implement a function to reverse each word in a sentence. For example, if the function is called with input of "I can be an   engineer", the function should return a string object with the value "I nac eb na   reenigne". Note that the whitespace between words is preserved.
• Share and explain the time and space complexities for your solution.
• At minimum, your implementation should pass the basic tests.

Python Considerations

The Ruby version of this assignment involved reversing words in a sentence in place. Unlike Ruby strings, Python strings are immutable, which means they can't be changed after they are initialized. Because strings cannot be modified in place, a new string must be created whenever a change must be made to a string.

Note: Do not use Python provided functionality for reversed(), reverse(), or string slicing ("string"[::-1]). You may use len().

Running the Tests

Install pytest

pip install pytest

To run all tests, navigate to the same directory as the test file and run:

pytest test_reverse_words.py

Alternatively, to exit instantly on first error or failed test, run:

pytest -x test_reverse_words.py

See pytest documentation for more information about pytest.