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import pandas as pd

import pandas as pd            #for reading & storing data, pre-processing

import pandas as pd     # To use dataframes

train = pd.read_csv('/kaggle/input/walmart-sales-forecast/train.csv')
stores = pd.read_csv('/kaggle/input/walmart-sales-forecast/stores.csv')
features = pd.read_csv('/kaggle/input/walmart-sales-forecast/features.csv')

train.set_index('Date', inplace=True)