python - How to replace multiple values in a pandas dataframe? -


how can replace multiple values mapping in pandas dataframe?

i have 1 column want replace following mapping.

mapping apple=fruit tomato=vegetable steak=protein milk=dairy

so column becomes.

col1       ->     col1 apple             fruit apple             fruit tomato            vegtable steak             protein milk              dairy

how can efficiently?

just create dictionary mapping , call series.map. 

>>> d = {'apple': 'fruit',           'tomato': 'vegetable',           'steak': 'protein',           'milk': 'dairy'}  >>> df.col1.map(d)  0        fruit 1        fruit 2    vegetable 3      protein 4        dairy name: col1, dtype: object

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