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import glob

import pandas as pd

import pandas as pd # data processing, CSV file I/O (e.g. pd.read_csv)

import numpy as np
import pandas as pd
import os
import glob
import pandas as pd
path = '../input/pandastasks/Pandas-Data-Science-Tasks-master/SalesAnalysis/Sales_Data'
filenames = glob.glob(path + '/*.csv')
dfs = []
for filename in filenames:
    dfs.append(pd.read_csv(filename))
big_frame = pd.concat(dfs, ignore_index=True)

big_frame.tail()