由于書中代碼是Python2，而自己使用的是Python3,在測試 決策樹存儲代碼時出現錯誤：

Traceback (most recent call last):  File "/home/xxx/AI/DecisionTree/test3.py", line 11, in <module>    trees.storeTree(myTree, 'classifierStorage.txt')  File "/home/xxx/AI/DecisionTree/trees.py", line 110, in storeTree    pickle.dump(inputTree, fw)TypeError: write() argument must be str, not bytes

解決方法：

fw = open(filename, 'w')改為
fw = open(filename, 'wb')完整代碼如下
# 在磁盤上存儲 決策樹對象  用于節省時間def storeTree(inputTree, filename):    import pickle    fw = open(filename, 'wb')    pickle.dump(inputTree, fw)    fw.close()繼續運行
出現錯誤：
Traceback (most recent call last):  File "/home/xxx/AI/DecisionTree/test3.py", line 12, in <module>    load_tree = trees.grabTree('classifierStorage.txt')  File "/home/xxx/AI/DecisionTree/trees.py", line 117, in grabTree    return pickle.load(fr)  File "/usr/lib/python3.5/codecs.py", line 321, in decode    (result, consumed) = self._buffer_decode(data, self.errors, final)UnicodeDecodeError: 'utf-8' codec can't decode byte 0x80 in position 0: invalid start byte
解決方法：
fr = open(filename)改為
fr = open(filename, 'rb')完整代碼：
# 加載存儲在磁盤上的 決策樹def grabTree(filename):    import pickle    fr = open(filename, 'rb')    return pickle.load(fr)