python 3.x - take the year from date type in a pandas dataframe column -

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i have year data in pandas dataframe following:

0     06/09/1937  1     22/11/1972

and extract year data:

0     1937  1     1972

my code:

features["year"] = df["birth_date"].str.split('/',2) features["year"] = features["year"][:2]

i got error as:

valueerror: can tuple-index multiindex

then tried

features["year"] = [x[2] x in features["year"]]

typeerror: 'float' object not subscriptable

i use python 3. tell me reasons these 2 errors , how correct them? in advance.

you need:

features["year"] = df["birth_date"].str.split('/',2) features["year"] = features["year"].str[:2]

MOno