title: Dynamically read csv files python pandas
body: <p>I would like to iteratively read data from a set of csv files in a for loop. 
  The csv files are named (<code>1.csv</code>, <code>2.csv</code> and so on)</p>
  
  <p>The normal way to read the data will be </p>
  
  <p><code>data = pd.read_csv('1.csv')</code></p>
  
  <p>Please can someone suggest how to replace <code>1</code> by <code>i</code> when using a <code>for</code> loop.</p>
  
  <p>I tried <code>data = pd.read_csv(i+'.csv')</code> and <code>data = pd.read_csv(i'.csv')</code> but they did not work.</p>