@given('the default tags "{default_tags:TagExpression}"')
def step_given_the_tag_expression(context, default_tags):
 context.default_tags = default_tags
 tag_expression = getattr(context, 'tag_expression', None)
 if (tag_expression is None):
  context.tag_expression = default_tags

@ given ( 'the default tags "{default_tags:TagExpression}"' ) def step_given_the_tag_expression ( context , default_tags ) : context . default_tags = default_tags tag_expression = getattr ( context , 'tag_expression' , None ) if ( tag_expression is None ) : context . tag_expression = default_tags
define a tag expression that is used later-on .