Fix ModuleNotFoundError in test collection caused by absolute import in __init__.py

[Copilot]

Describe the Pull Request

Pytest test collection fails with ModuleNotFoundError: No module named 'main' when importing __init__.py from certain directory contexts. The absolute import from main import workout doesn't resolve when the package is imported from a parent directory during test discovery.

Expected Behavior

Tests should collect and run successfully regardless of the directory context from which pytest is invoked.

Fixes the Following Issues

Resolves the test collection errors reported in the testing workflow:

• ERROR collecting tests/test_gui.py - ImportError at __init__.py:4
• ERROR collecting tests/test_main.py - ImportError at __init__.py:4

Changes

Modified __init__.py to handle both absolute and relative import contexts:

# Before
from main import workout

# After
try:
    from main import workout
except ImportError:
    from .main import workout

This allows the import to succeed when:

• Running as an installed package (absolute import)
• Importing from parent directories during test collection (relative import)

Desktop Developed On (please complete the following information):

• OS: Linux
• Program Version: 1.2.0
• Python Version: 3.12.3

Additional Context

The fix maintains backward compatibility with existing import patterns while enabling proper test discovery. No functional changes to the workout() function or test suite.

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Original prompt

I get the following errors on the testing workflow, can you fix them so all the tests pass: ==================================== ERRORS ====================================
______________________ ERROR collecting tests/test_gui.py ______________________
ImportError while importing test module '/home/runner/work/PyWorkout/PyWorkout/tests/test_gui.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/opt/hostedtoolcache/Python/3.11.14/x64/lib/python3.11/site-packages/_pytest/python.py:507: in importtestmodule
mod = import_path(
/opt/hostedtoolcache/Python/3.11.14/x64/lib/python3.11/site-packages/_pytest/pathlib.py:587: in import_path
importlib.import_module(module_name)
/opt/hostedtoolcache/Python/3.11.14/x64/lib/python3.11/importlib/init.py:126: in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
:1204: in _gcd_import
???
:1176: in _find_and_load
???
:1126: in _find_and_load_unlocked
???
:241: in _call_with_frames_removed
???
:1204: in _gcd_import
???
:1176: in _find_and_load
???
:1126: in _find_and_load_unlocked
???
:241: in _call_with_frames_removed
???
:1204: in _gcd_import
???
:1176: in _find_and_load
???
:1147: in _find_and_load_unlocked
???
:690: in _load_unlocked
???
:940: in exec_module
???
:241: in _call_with_frames_removed
???
init.py:4: in
from main import workout
E ModuleNotFoundError: No module named 'main'
_____________________ ERROR collecting tests/test_main.py ______________________
ImportError while importing test module '/home/runner/work/PyWorkout/PyWorkout/tests/test_main.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/opt/hostedtoolcache/Python/3.11.14/x64/lib/python3.11/site-packages/_pytest/python.py:507: in importtestmodule
mod = import_path(
/opt/hostedtoolcache/Python/3.11.14/x64/lib/python3.11/site-packages/_pytest/pathlib.py:587: in import_path
importlib.import_module(module_name)
/opt/hostedtoolcache/Python/3.11.14/x64/lib/python3.11/importlib/init.py:126: in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
:1204: in _gcd_import
???
:1176: in _find_and_load
???
:1126: in _find_and_load_unlocked
???
:241: in _call_with_frames_removed
???
:1204: in _gcd_import
???
:1176: in _find_and_load
???
:1126: in _find_and_load_unlocked
???
:241: in _call_with_frames_removed
???
:1204: in _gcd_import
???
:1176: in _find_and_load
???
:1147: in _find_and_load_unlocked
???
:690: in _load_unlocked
???
:940: in exec_module
???
:241: in _call_with_frames_removed
???
init.py:4: in
from main import workout
E ModuleNotFoundError: No module named 'main'

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