#NEWLINE# @ classmethod #NEWLINE# def _download_python_sources( cls , to_dir ) : #NEWLINE# #INDENT# url = 'https://www.python.org/ftp/python/2.7.8/Python-2.7.8.tgz' #NEWLINE# subprocess . check_call ( [ 'wget' , '-c' , to_dir ] , cwd = to_dir )