Lazy loading

[esoteric-ephemera]

Enhancements:

Expanding scope of lazy loading to:

• Lazily load a rester for an endpoint only when it is inspected
• Lazily initialize a rester only when it is called

Some usage examples for the LazyImport class in tests/core/test_utils.py for how it can be used beyond just the resters

Housekeeping:

Focusing on removing (i) boilerplate repeated code and (ii) extraneous dependencies

• Remove unused dependencies: msgpack
• Remove smart_open in favor of basic boto / gzip interactions
• Remove unused test data which has been ported to emmet
• Make convenience methods for validating formatting of endpoints
• Homogenize _query_open_data to throw uniform errors when objects cannot be found

[codecov-commenter]

Codecov Report

❌ Patch coverage is 93.65079% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.64%. Comparing base (e1cd425) to head (d3a5bc2).

Files with missing lines	Patch %	Lines
mp_api/client/core/client.py	95.91%	2 Missing ⚠️
mp_api/client/routes/molecules/bonds.py	0.00%	1 Missing ⚠️
mp_api/client/routes/molecules/molecules.py	83.33%	1 Missing ⚠️
mp_api/client/routes/molecules/orbitals.py	0.00%	1 Missing ⚠️
mp_api/client/routes/molecules/partial_charges.py	0.00%	1 Missing ⚠️
mp_api/client/routes/molecules/partial_spins.py	0.00%	1 Missing ⚠️
mp_api/client/routes/molecules/redox.py	0.00%	1 Missing ⚠️
mp_api/client/routes/molecules/summary.py	0.00%	1 Missing ⚠️
mp_api/client/routes/molecules/tasks.py	0.00%	1 Missing ⚠️
mp_api/client/routes/molecules/thermo.py	0.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1044      +/-   ##
==========================================
- Coverage   77.33%   74.64%   -2.70%     
==========================================
  Files          56       56              
  Lines        3036     2903     -133     
==========================================
- Hits         2348     2167     -181     
- Misses        688      736      +48     

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[esoteric-ephemera]

Just to note that these changes are effective: the tests run in roughly 140-160 sec, brought down from 200-210 sec on main