image_output_1.png
import pandas as pd # data processing, CSV file I/O (e.g. pd.read_csv)

about_data = pd.read_csv('../input/AboutIsis.csv', encoding='ISO-8859-1')
fanboy_data = pd.read_csv('../input/IsisFanboy.csv', encoding='ISO-8859-1')

about_data.keys()

print(len(set(fanboy_data['username'])), len(set(about_data['username'])))