See my comment in #165

Tests for certain modules are failing with RecursionError in #165 and other PRs. I suspect that this is because tests in lab_test.py, library_test.py, and people_test.py call their module functions directly (thereby making real HTTP requests) instead of mocking their inputs, which is done for other modules' tests.

Test files to be rewritten:

• lab_test.py
• library_test.py
• news_test.py
• people_test.py