def __init__(self, version='<STR_LIT>'):
try:<EOL><INDENT>distribution, self._ext = self._distribution_info()<EOL><DEDENT>except KeyError:<EOL><INDENT>print('<STR_LIT>')<EOL><DEDENT>else:<EOL><INDENT>cspice = '<STR_LIT>'.format(self._ext)<EOL>self._rcspice = ('<STR_LIT>'<EOL>'<STR_LIT>'<EOL>'<STR_LIT>').format(version, distribution, cspice)<EOL>self._root = os.path.realpath(os.path.dirname(__file__))<EOL>print('<STR_LIT>'.format(distribution))<EOL>attempts = <NUM_LIT:10>   <EOL>while attempts:<EOL><INDENT>attempts -= <NUM_LIT:1><EOL>try:<EOL><INDENT>self._download()<EOL><DEDENT>except RuntimeError as error:<EOL><INDENT>print("<STR_LIT>"<EOL>"<STR_LIT>".format(error))<EOL>time.sleep(<NUM_LIT:15>)<EOL><DEDENT>else:<EOL><INDENT>print('<STR_LIT>')<EOL>self._unpack()<EOL>break<EOL><DEDENT><DEDENT><DEDENT>
Init method that uses either the default N0066 toolkit version token
        or a user provided one.