'Parse all arguments from the provided request and return the results
as a Namespace
:param strict: if req includes args not in parser, throw 400 BadRequest exception'

def parse_args(self, req=None, strict=False):

    if (req is None):
        req = request
    namespace = self.namespace_class()
    req.unparsed_arguments = (dict(self.argument_class('').source(req)) if strict else {})
    errors = {}
    for arg in self.args:
        (value, found) = arg.parse(req, self.bundle_errors)
        if isinstance(value, ValueError):
            errors.update(found)
            found = None
        if (found or arg.store_missing):
            namespace[(arg.dest or arg.name)] = value
    if errors:
        flask_restful.abort(400, message=errors)
    if (strict and req.unparsed_arguments):
        raise exceptions.BadRequest(('Unknown    arguments:    %s' % ',    '.join(req.unparsed_arguments.keys())))
    return namespace
