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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def available_formats():
 """ Get a list of all available loaders Returns loaders : list Extensions of available loaders i.e. 'stl', 'ply', 'dxf', etc. """

    loaders = mesh_formats()
    loaders.extend(path_formats())
    loaders.extend(compressed_loaders.keys())

    return loaders