# Using as a package¶

If you wish to produce light curves or other data products for a given model without using the fitting and evidence accumulation features of MOSFiT, functions within the code can be accessed by importing the mosfit package into your Python code.

## Produce model outputs¶

In the code snippet below, we fetch a supernova’s data from the Open Catalogs using the Fetcher class, create a Model that initializes from the fetched data, and finally run the model:

import mosfit
import numpy as np

# Create an instance of the Fetcher class.
my_fetcher = mosfit.fetcher.Fetcher()

# Fetch some data from the Open Supernova Catalog.
fetched = my_fetcher.fetch('SN2009do')[0]

# Instantiatiate the Model class (selecting 'slsn' as the model).
my_model = mosfit.model.Model(model='slsn')

# Load the fetched data into the model.
print('Keys in output: {}'.format(', '.join(list(outputs.keys()))))