CART决策树 python 代码，思想来自Programming Collective Intelligence。未剪枝。数据来自the census bureau database。-CART decision tree python code, thoughts from Programming Collective Intelligence. Not pruning. The data from the census burea

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简单的决策树，使用增益率，未考虑剪枝，和过拟合现象。包含数据。(this file contains data.)