This is easy.
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first_module.magic()
We are importing a module called first_module, by now you should know what we mean by importing. Then we are calling functions inside the module we imported. Pls take note of how we imported the module.
We can give our modules a different name on import.
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fm.magic()
This should give the same result as first_module.magic() because only gave first_module another name (like an a.k.a) by using the 'as' on our import statement
Research more about import statements