人工智能的机器学习的示例代码

字典特征的抽取：

import sklearn
from sklearn.feature_extraction import DictVectorizer

dv = DictVectorizer()
instances = [{'city': '北京','temperature':100},{'city': '上海','temperature':60}, {'city': '深圳','temperature':150}]
data = dv.fit_transform(instances).toarray()
print(data)
print(dv.get_feature_names())
print(dv.inverse_transform(data))
import sklearn
from sklearn.f