python读取文本数据到矩阵（用于scikit-learn输入）
def load_data():
train = numpy.loadtxt(open("D:\dev_src\python\weibo_keywords\extra_dict\word_feature_train.csv", "rb"), delimiter=",", skiprows=0)
test = numpy.loadtxt(open("D:\dev_src\python\weibo_keywords\extra_dict\word_feature_test.csv", "rb"), delimiter=",", skiprows=0)
train_x = train[:,0:2]
train_y = train[:,2]
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