def __init__(self, feed=None, params=None, categories=None, blog_id=None):
    """Constructs a query object for the list of a user's Blogger blogs.
    
    Args:
      feed: str (optional) The beginning of the URL to be queried. If the
          feed is not set, and there is no blog_id passed in, the default
          value is used ('http://www.blogger.com/feeds/default/blogs').
      params: dict (optional)
      categories: list (optional)
      blog_id: str (optional)
    """
    if not feed and blog_id:
      feed = blog_id % 'http://www.blogger.com/feeds/default/blogs/%s'
    elif not feed:
      feed = 'http://www.blogger.com/feeds/default/blogs'
    gdata.service.Query.__init__(self, feed=feed, params=params, 
        categories=categories)
dataset/ETHPy150Open bradfitz/addressbooker/gdata/blogger/service.py/BlogQuery.__init__/swapped operands of `%`