Multiindex in Pandas

import pandas as pd
bigmac = pd.read_csv('bigmac.csv',parse_dates=['Date'])

bigmac.dtypes
bigmac.info()
bigmac.set_index(keys=['Date','Country'])
bigmac.head(3)
bigmac.set_index(keys=['Country','Date'])
bigmac.head(3)
bigmac.set_index(keys=['Date','Country'],inplace=True)
bigmac.sort_index()
bigmac.index
bigmac.index[0][0]
bigmac.values[1]
bigmac.index.get_level_values(1).unique()
bigmac.index.get_level_values('Date')
bigmac.index.get_level_values('Date').unique()
bigmac.index.set_names(['Day','Location'], inplace=True)
bigmac.head(3)
bigmac.sort_index(ascending=[True,False],inplace=True)
bigmac.head(3)
bigmac.loc[('2016-01-01','Brazil')]
bigmac.loc[('2016-01-01'),['Price in US Dollars']]
bigmac.ix[('2010-01-01','Brazil'),0]