Python Decorators and Generators | Dataford Interview Questions

Explain Python decorators and generators

Asked in the Round 1 technical stage. For this hands-on version, implement normalize_stream using both a decorator and a generator.

Input and Output

The function receives a list of strings. Return a dictionary with items, containing non-empty strings stripped of surrounding whitespace and converted to lowercase, and generator_calls, containing the number of times the decorated generator is consumed.

Example: [' Hello ', ' ', 'WORLD'] returns {'items': ['hello', 'world'], 'generator_calls': 1}.

Constraints

0 <= len(values) <= 100
Every element is a string
Preserve the order of non-empty values

Function Signature

def normalize_stream(values):

Your question is Python Decorators and Generators. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem