You can access the key by:

dict has no native method for this. But there is a maneuver that can be done.

You can use the values method, which returns a list . Then you get the index from that list and get the values from the other list generated by the keys method.

Confused? So let's take an example:

valores = {"valor_16" : 16, "valor_17" : 17}

valores.keys()[valores.values().index(16)]; // "valor_16"

Original answer on SOEN