在python中，利用ID3方法画决策树,决策树是一种依托决策而建立起来的一种树。在机器学习中,决策树是一种预测模型,代表的是一种对 象属性与对象值之间的一种映射关系(In Python, ID3 method is used to draw decision tree. Decision tree is a kind of tree based on decision. In machine learning, decision tree is a prediction model, which represents a mapping relationship between object attributes and object values)