iframe-proxy | Sunbelt Computer Software

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"""Usage: prog.py [--count=N] PATH FILE...
  FILE     input file
  PATH     out directory
  --count=N   number of operations
from docopt import docopt
    from schema import Schema, And, Or, Use, SchemaError
except ImportError:
    exit('This example requires that `schema` data-validation library'
         ' is installed: \n    pip install schema\n'
         'https://github.com/halst/schema')
if __name__ == '__main__':
    args = docopt(__doc__)
    schema = Schema({
        'FILE': [Use(open, error='FILE should be readable')],
        'PATH': And(os.path.exists, error='PATH should exist'),
        '--count': Or(None, And(Use(int), lambda n: 0 < n < 5),
                      error='--count=N should be integer 0 < N < 5')})
        args = schema.validate(args)
    except SchemaError as e:
        exit(e)
    print(args)

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