Air mass model in PVLIB [closed] - python

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When running:
mc.run_model(tmy_data)
which air mass model is used?
https://pvpmc.sandia.gov/modeling-steps/1-weather-design-inputs/irradiance-and-insolation-2/air-mass/
how can I change to other air mass model?
Moreover, where can I find that information (what mathematical models are created in python and how to change it, to run the: mc.run_model(tmy_data).

The ModelChain documentation states:
airmass_model (str, default 'kastenyoung1989') – Passed to location.get_airmass.

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1.Program to Interface Not Implementation
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The details of the project is to get the solution of oops features from the above statement.
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features of OOP's are:
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Is it doable to update my trained model (fbprophet) in order to surpass the dilemma of retraining the whole dataset every time?
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How can I generate random data in google maps like format i.e. 29.299332, 52.892959?
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