extract year from a column python code example

Example 1: month from datetime pandas

#Exctract month and create a dedicated column df["Month"] from a 
#column in datetime format df["Date"]
df['Month'] = pd.DatetimeIndex(df['Date']).month

Example 2: python take the month of date in new column

#pandas datetimeindex docs: https://pandas.pydata.org/pandas-docs/stable/generated/pandas.DatetimeIndex.html
df['month'] = pd.DatetimeIndex(df['birth_date']).month
df.head()