ch3，p56，“niter” parameter missed

[konfer]

with the initialized of the Perceptron class , the book mentioned the parameter "n_iter", the i cannot found in the code, and the code of 2nd has it. so i think it should be a issue

[rasbt]

Thanks for the note! You are right, I missed that part of the sentence during editing, and the n_iter parameter has been removed from sklearn in v 0.21. Just added it to the errata (https://github.com/rasbt/python-machine-learning-book-3rd-edition/blob/master/errata/README.md). Thanks!