title: Please what is the meaning of the Deprecation_Warning message?
body: <p>I used Perceptron from sklearn.linear_model for the first time and I got this message</p>
  
  <p>"DeprecationWarning: n_iter parameter is deprecated in 0.19 and will be removed in 0.21. Use max_iter and tol instead.</p>
  
  <p>DeprecationWarning"</p>
  
  <p>while using the following code.</p>
  
  <pre><code>from sklearn.linear_model import Perceptron
  ppn=Perceptron(n_iter=40, eta0= 0.1, random_state=1)
  ppn.fit(X_train_std, y_train)
  y_pred = ppn.predict(X_test_std)
  </code></pre>
  
  <p>Could somebody tell me what is the issue here ? Thank you</p>