python - how to join multiple csv files without repetition? -


i have 3 csv files should have same date column that:

file1.csv             file2.csv             file3.csv date,price1           date,price2           date,price3 2017-03-03,1900       2017-03-03,1200       2017-03-03,1220 2017-03-04,2900       2017-03-04,2200       2017-03-04,2233 2017-03-04,1300       2017-03-04,1549       2017-03-04,1520

i want join them , using python:

file4.csv date,price1,price2,price3 2017-03-03,1900,1200,1220 2017-03-04,2900,2200,2233 2017-03-04,1300,1549,1520

one can combine 2 files @ time. repeat process other files well. 

import pandas pd  df1 = pd.read_csv('file1.csv') df2 = pd.read_csv('file2.csv') df3 = pd.read_csv('file3.csv')  df12 = pd.merge(df1, df2, how='outer', on='date') df123 = pd.merge(df12, df3, how='outer', on='date') print(df123)

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