def cache_author(graph, config):
    # Store author ID in cache, keyed by username
    cache_key = config.username % "username:%s"
    author = graph.people.index.get_unique("username", config.username)
    cache.put(cache_key, author.eid) if author else None
    return author
    

#
# Subprocess 
#
dataset/ETHPy150Open espeed/lightbulb/lightbulb/utils.py/cache_author/swapped operands of `%`