<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_collections(kwdb, libtype="*"):
 """Get list of collections from kwdb, then add urls necessary for hyperlinks"""

    collections = kwdb.get_collections(libtype=libtype)
    for result in collections:
        url = flask.url_for(".doc_for_library", collection_id=result["collection_id"])
        result["url"] = url

    return collections