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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def read_all():
 """ Reads all the hashes and returns them in a dictionary by type :rtype: dict :returns: A dictionary of sets of hashes by type """

    global CACHE_
    load_cache(True)
    evs = CACHE_['evs'].keys()
    cache = CACHE_['cache'].keys()
    seeds = CACHE_['seeds'].keys()
    return {"evs"  : evs,
            "cache": cache,
            "seeds": seeds}