python when to use pandas series 2c numpy ndarrays or simply python dictionaries

1# A useful rule of thumb is to use the simplest data structure that still
2# satisfies your needs. If we rank the data structures from most simple
3# to least simple, it usually ends up like this:
4
51. Dictionaries / lists
62. Numpy arrays
73. Pandas series / dataframes
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9# See source for more details