def import_env(*envs):
    'import environment variables from host'
    for env in envs:
        parts = env.split(':', 1)
        if len(parts) == 1:
            export_as = env
        else:
            env, export_as = parts
        env_val = os.environ.get(env)
        if env_val is not None:
            yield '{}={}'.format(export_as, shlex.quote(env_val))
def import_env ( * envs ) : for env in envs : parts = env . split ( ':' , 1 ) if len ( parts ) == 1 : export_as = env else : env , export_as = parts env_val = os . environ . get ( env ) if env_val is not None : yield '{}={}' . format ( export_as , shlex . quote ( env_val ) )
import environment variables from host