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import numpy as np # linear algebra

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

train = pd.read_csv('/kaggle/input/ods-mlclass-dubai-2019-03-lecture3-hw/train.csv')
test = pd.read_csv('/kaggle/input/ods-mlclass-dubai-2019-03-lecture3-hw/test.csv')

test['target'] = np.nan
df = pd.concat([train, test])
df.head()