def gists_by(username, number=(-1), etag=None):
 if username:
  return gh.gists_by(username, number, etag)
 return iter([])

def gists_by ( username , number = ( - 1 ) , etag = None ) : if username : return gh . gists_by ( username , number , etag ) return iter ( [ ] )
iterate over gists created by the provided username .