how to join multiple csv files without repetition? : <p>I have 3 csv files they all should have the same date column like that:</p>

<pre><code>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
</code></pre>

<p>I want to join them and get this using python:</p>

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