Created
April 7, 2017 21:09
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This python program using pandas for merge multiple (not just 2!) csv file based on primary key
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| # http://pandas.pydata.org/pandas-docs/stable/merging.html | |
| # Search on 'Brief primer on merge methods (relational algebra)' | |
| import pandas as pd | |
| csv_input = pd.read_csv('./file_A.csv') | |
| df = pd.DataFrame(csv_input) | |
| csv_input2 = pd.read_csv('./file_B.csv') | |
| df2 = pd.DataFrame(csv_input2) | |
| combined = pd.merge(csv_input, csv_input2, on='Primary Key') | |
| combined.to_csv('output.csv', index=False) |
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