This is the Python equivalent of the Java StringsAndThings lab exercise.

The StringsAndThings class contains 5 methods that perform various string manipulation tasks:

1. count_yz(input_str) - Count words ending in 'y' or 'z'
2. remove_string(base, remove) - Remove all instances of a substring
3. contains_equal_number_of_is_and_not(input_str) - Check if "is" and "not" appear equally
4. g_is_happy(input_str) - Check if all 'g' characters have adjacent 'g' neighbors
5. count_triple(input_str) - Count sequences of 3 identical characters

1. Implement the methods in strings_and_things.py
2. Run the tests with: python -m pytest test_strings_and_things.py -v or python test_strings_and_things.py

The test file test_strings_and_things.py contains comprehensive test cases for all methods, mirroring the Java JUnit tests.

Each method currently returns None and needs to be implemented to pass the tests.