z624116733的博客

1. Motivation for dictionaries--list中index()的应用，即返回索引，zero-based # Definition of countries and capital countries = ['spain', 'france', 'germany', 'norway'] capitals = ['madrid', 'paris', 'berl

GridSearchCV 用于系统地遍历多种参数组合，通过交叉验证确定最佳效果参数。它的好处是，只需增加几行代码，就能遍历多种组合。 下面是来自 sklearn 文档 的一个示例： parameters = {'kernel':('linear', 'rbf'), 'C':[1, 10]} svr = svm.SVC() clf = grid_search.GridSearchCV(s

# ---------- # # In this exercise, you will update the perceptron class so that it can update # its weights. # # Finish writing the update() method so that it updates the weights according # to