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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 Setup():
    '''
    Called when the code is installed. Sets up directories and downloads
    the K2 catalog.

    '''

    if not os.path.exists(os.path.join(EVEREST_DAT, 'k2', 'cbv')):
        os.makedirs(os.path.join(EVEREST_DAT, 'k2', 'cbv'))
    GetK2Stars(clobber=False)