stevedore/stevedore/example/load_as_extension.py
Doug Hellmann 6535133e88 finish tutorial section on loading plugins
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
2013-06-05 18:45:00 -04:00

40 lines
861 B
Python

from __future__ import print_function
import argparse
from stevedore import extension
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument(
'--width',
default=60,
type=int,
help='maximum output width for text',
)
parsed_args = parser.parse_args()
data = {
'a': 'A',
'b': 'B',
'long': 'word ' * 80,
}
mgr = extension.ExtensionManager(
namespace='stevedore.example.formatter',
invoke_on_load=True,
invoke_args=(parsed_args.width,),
)
def format_data(ext, data):
return (ext.name, ext.obj.format(data))
results = mgr.map(format_data, data)
for name, result in results:
print('Formatter: {0}'.format(name))
for chunk in result:
print(chunk, end='')
print('')