问题：NameError: name 'reload' is not defined

import imp
import trees
imp.reload(trees)

结论：已经导入过的模块才能用reload, reload的参数应该是模块名，而不是文件名。在pyhton3.x中要先导入文件和imp模块，才能用imp.reload()

问题：关于Plot图像不显示中文文字问题

原因是标题默认输出英文，如果输出中文，要对字体进行调整。需要在程序定义前输入：

plt.rcParams['font.sans-serif']=['SimHei']
plt.rcParams['axes.unicode_minus'] = False

问题：TypeError: ‘dict_keys’ object does not support indexing

这个问题是python版本的问题

#如果使用的是python2
firstStr = myTree.keys()[0]
#LZ使用的是python3
firstSides = list(myTree.keys())
firstStr = firstSides[0]

解决办法就是先转换成list，再把需要的索引提取出来。

问题：Python3文件读写错误 TypeError: write() argument must be str, not bytes

Traceback (most recent call last):
  File "<pyshell#121>", line 1, in <module>
    trees.storeTree(myTree,'classifierStorage.txt')
  File "C:\Users\34856\Desktop\trees.py", line 97, in storeTree
    pickle.dump(inputTree,fw)
TypeError: write() argument must be str, not bytes

解决方法：

fw = open(filename, 'w')

改为

fw = open(filename, 'wb')

完整代码如下

# 在磁盘上存储 决策树对象  用于节省时间
def storeTree(inputTree, filename):import picklefw = open(filename, 'wb')pickle.dump(inputTree, fw)fw.close()

继续运行

出现错误：UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 0: illegal multibyte sequence

Traceback (most recent call last):
  File "<pyshell#126>", line 1, in <module>
    trees.grabTree('classifierStorage.txt')
  File "C:\Users\34856\Desktop\trees.py", line 103, in grabTree
    return pickle.load(fr)
UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 0: illegal multibyte sequence

解决方法：

fr = open(filename)

改为

fr = open(filename, 'rb')

完整代码：

# 加载存储在磁盘上的 决策树def grabTree(filename):import picklefr = open(filename, 'rb')return pickle.load(fr)

问题：AttributeError: 'dict' object has no attribute 'iteritems'

Python3.x中：iteritems变为items

附录：

Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 17:00:18) [MSC v.1900 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import treePlotter
Traceback (most recent call last):File "<pyshell#0>", line 1, in <module>import treePlotter
ModuleNotFoundError: No module named 'treePlotter'
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()
Traceback (most recent call last):File "<pyshell#2>", line 1, in <module>treePlotter.createPlot()File "C:\Users\34856\Desktop\treePlotter.py", line 16, in createPlotcreatePlot.ax1 = plt.subplot(111,frmaeon = Flase)
NameError: name 'Flase' is not defined
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()
Traceback (most recent call last):File "<pyshell#4>", line 1, in <module>treePlotter.createPlot()File "C:\Users\34856\Desktop\treePlotter.py", line 16, in createPlotcreatePlot.ax1 = plt.subplot(111,frmaeon = False)File "C:\Users\34856\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\pyplot.py", line 1103, in subplota = fig.add_subplot(*args, **kwargs)File "C:\Users\34856\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\figure.py", line 1370, in add_subplota = subplot_class_factory(projection_class)(self, *args, **kwargs)File "C:\Users\34856\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\axes\_subplots.py", line 70, in __init__self._axes_class.__init__(self, fig, self.figbox, **kwargs)File "C:\Users\34856\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\axes\_base.py", line 498, in __init__self.update(kwargs)File "C:\Users\34856\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\artist.py", line 916, in updateret = [_update_property(self, k, v) for k, v in props.items()]File "C:\Users\34856\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\artist.py", line 916, in <listcomp>ret = [_update_property(self, k, v) for k, v in props.items()]File "C:\Users\34856\AppData\Local\Programs\Python\Python36\lib\site-packages\matplotlib\artist.py", line 912, in _update_propertyraise AttributeError('Unknown property %s' % k)
AttributeError: Unknown property frmaeon
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()
>>> treePlotter.createPlot()=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.createPlot()
>>> import imp
>>> imp.reload(treePlotter)
<module 'treePlotter' from 'C:\\Users\\34856\\Desktop\\treePlotter.py'>
>>> treePlotterr.retrieveTree(1)
Traceback (most recent call last):File "<pyshell#24>", line 1, in <module>treePlotterr.retrieveTree(1)
NameError: name 'treePlotterr' is not defined
>>> treePlotter.retrieveTree(1)
Traceback (most recent call last):File "<pyshell#25>", line 1, in <module>treePlotter.retrieveTree(1)
AttributeError: module 'treePlotter' has no attribute 'retrieveTree'
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> treePlotter.retrieveTree(1)
{'no surfacing': {0: 'no', 1: {'flippers': {0: {'head': {0: 'no', 1: 'yes'}}, 1: 'no'}}}}
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.getNumLeafs(myTree)
Traceback (most recent call last):File "<pyshell#29>", line 1, in <module>treePlotter.getNumLeafs(myTree)File "C:\Users\34856\Desktop\treePlotter.py", line 26, in getNumLeafsfirstStr = myTree.keys()[0]
TypeError: 'dict_keys' object does not support indexing
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> mport treePlotter
SyntaxError: invalid syntax
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.getNumLeafs(myTree)
3
>>> treePlotter.getTreeDepth(myTree)
Traceback (most recent call last):File "<pyshell#34>", line 1, in <module>treePlotter.getTreeDepth(myTree)File "C:\Users\34856\Desktop\treePlotter.py", line 37, in getTreeDepthfirstStr = myTree.keys()[0]
TypeError: 'dict_keys' object does not support indexing
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.getNumLeafs(myTree)
3
>>> treePlotter.getTreeDepth(myTree)
2
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree =treePlotter.retrieveTree(0)
>>> treePlotter.createPlot(myTree)
Traceback (most recent call last):File "<pyshell#41>", line 1, in <module>treePlotter.createPlot(myTree)
TypeError: createPlot() takes 0 positional arguments but 1 was given
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> firstSides = list(myTree.keys())firstStr = firstSides[0]SyntaxError: multiple statements found while compiling a single statement
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.createPlot(myTree)
Traceback (most recent call last):File "<pyshell#45>", line 1, in <module>treePlotter.createPlot(myTree)File "C:\Users\34856\Desktop\treePlotter.py", line 86, in createPlotplotTree.totalD = float(getTreeDepth(inThree))
NameError: name 'inThree' is not defined
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.createPlot(myTree)
Traceback (most recent call last):File "<pyshell#48>", line 1, in <module>treePlotter.createPlot(myTree)File "C:\Users\34856\Desktop\treePlotter.py", line 88, in createPlotplotTree(inTree,(0.5,1.0),'')File "C:\Users\34856\Desktop\treePlotter.py", line 66, in plotTreeplotMidText(cntrPt,parenPt,nodeTxt)
NameError: name 'parenPt' is not defined
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.createPlot(myTree)
Traceback (most recent call last):File "<pyshell#51>", line 1, in <module>treePlotter.createPlot(myTree)File "C:\Users\34856\Desktop\treePlotter.py", line 88, in createPlotplotTree(inTree,(0.5,1.0),'')File "C:\Users\34856\Desktop\treePlotter.py", line 66, in plotTreeplotMidText(cntrPt,parentPt,nodeTxt)File "C:\Users\34856\Desktop\treePlotter.py", line 57, in plotMidTextcreatePlot.ax1.test(xMid,yMid,txtString)
AttributeError: 'function' object has no attribute 'ax1'
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.createPlot(myTree)
Traceback (most recent call last):File "<pyshell#54>", line 1, in <module>treePlotter.createPlot(myTree)File "C:\Users\34856\Desktop\treePlotter.py", line 88, in createPlotplotTree(inTree,(0.5,1.0),'')File "C:\Users\34856\Desktop\treePlotter.py", line 66, in plotTreeplotMidText(cntrPt,parentPt,nodeTxt)File "C:\Users\34856\Desktop\treePlotter.py", line 57, in plotMidTextcreatePlot.ax1.text(xMid,yMid,txtString)
AttributeError: 'function' object has no attribute 'ax1'
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.createPlot(myTree)
Traceback (most recent call last):File "<pyshell#57>", line 1, in <module>treePlotter.createPlot(myTree)File "C:\Users\34856\Desktop\treePlotter.py", line 88, in createPlotplotTree(inTree,(0.5,1.0),'')File "C:\Users\34856\Desktop\treePlotter.py", line 66, in plotTreeplotMidText(cntrPt,parentPt,nodeTxt)File "C:\Users\34856\Desktop\treePlotter.py", line 57, in plotMidTextcreatePlot.ax1.text(xMid,yMid,txtString)
AttributeError: 'function' object has no attribute 'ax1'
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.createPlot(myTree)
Traceback (most recent call last):File "<pyshell#60>", line 1, in <module>treePlotter.createPlot(myTree)File "C:\Users\34856\Desktop\treePlotter.py", line 88, in createPlotplotTree(inTree,(0.5,1.0),'')File "C:\Users\34856\Desktop\treePlotter.py", line 66, in plotTreeplotMidText(cntrPt,parentPt,nodeTxt)File "C:\Users\34856\Desktop\treePlotter.py", line 57, in plotMidTextcreatePlot.ax1.text(xMid,yMid,txtString)
AttributeError: 'function' object has no attribute 'ax1'
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.createPlot(myTree)
Traceback (most recent call last):File "<pyshell#63>", line 1, in <module>treePlotter.createPlot(myTree)File "C:\Users\34856\Desktop\treePlotter.py", line 81, in createPlotplotTree(inTree,(0.5,1.0),'')File "C:\Users\34856\Desktop\treePlotter.py", line 59, in plotTreeplotMidText(cntrPt,parentPt,nodeTxt)File "C:\Users\34856\Desktop\treePlotter.py", line 50, in plotMidTextcreatePlot.ax1.text(xMid,yMid,txtString)
AttributeError: 'function' object has no attribute 'ax1'
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> treePlotter.createPlot(myTree)
>>> myTree['no surfacing'][3] = 'maybe'
>>> myTree
{'no surfacing': {0: 'no', 1: {'flippers': {0: 'no', 1: 'yes'}}, 3: 'maybe'}}
>>> treePlotter.createPlot(myTree)
>>>
=============== RESTART: C:\Users\34856\Desktop\treePlotter.py ===============
>>> import treePlotter
>>> myTree= treePlotter.retrieveTree(0)
>>> myTree
{'no surfacing': {0: 'no', 1: {'flippers': {0: 'no', 1: 'yes'}}}}
>>> trees.classify(myTree,labels,[1,0])
Traceback (most recent call last):File "<pyshell#73>", line 1, in <module>trees.classify(myTree,labels,[1,0])
NameError: name 'trees' is not defined
>>> myDat,labels = trees.creatDataSet()
Traceback (most recent call last):File "<pyshell#74>", line 1, in <module>myDat,labels = trees.creatDataSet()
NameError: name 'trees' is not defined
>>>
================== RESTART: C:\Users\34856\Desktop\trees.py ==================
>>> import trees
>>> myDat,labels=trees.creatDataSet()
Traceback (most recent call last):File "<pyshell#76>", line 1, in <module>myDat,labels=trees.creatDataSet()
AttributeError: module 'trees' has no attribute 'creatDataSet'
>>> myDat,labels=trees.createDataSet()
>>> labels
['no surfacing', 'flippers']
>>> myTree = treePlotter.retrieveTree(0)
Traceback (most recent call last):File "<pyshell#79>", line 1, in <module>myTree = treePlotter.retrieveTree(0)
NameError: name 'treePlotter' is not defined
>>> import treePlotter
>>> myTree = treePlotter.retrieveTree(0)
>>> myTree
{'no surfacing': {0: 'no', 1: {'flippers': {0: 'no', 1: 'yes'}}}}
>>> myTree = treePlotter.retrieveTree(1)
>>> myTree
{'no surfacing': {0: 'no', 1: {'flippers': {0: {'head': {0: 'no', 1: 'yes'}}, 1: 'no'}}}}
>>> treePlotter.createPlot(myTree)
>>> trees.classify(myTree,labels,[1,0])
Traceback (most recent call last):File "<pyshell#86>", line 1, in <module>trees.classify(myTree,labels,[1,0])File "C:\Users\34856\Desktop\trees.py", line 83, in classifyfirstSides = list(myTree.keys())
NameError: name 'myTree' is not defined
>>> import treePlotter
>>>  myTree = treePlotter.retrieveTree(0)
SyntaxError: unexpected indent
>>> myTree = treePlotter.retrieveTree(0)
>>> trees.classify(myTree,labels,[1,0])
Traceback (most recent call last):File "<pyshell#90>", line 1, in <module>trees.classify(myTree,labels,[1,0])File "C:\Users\34856\Desktop\trees.py", line 83, in classifyfirstSides = list(myTree.keys())
NameError: name 'myTree' is not defined
>>>
================== RESTART: C:\Users\34856\Desktop\trees.py ==================
>>> import trees
>>> myTree = treePlotter.retrieveTree(0)
Traceback (most recent call last):File "<pyshell#92>", line 1, in <module>myTree = treePlotter.retrieveTree(0)
NameError: name 'treePlotter' is not defined
>>> import treePlotter
>>> myDat,labels=trees.createDataSet()
>>> myTree = treePlotter.retrieveTree(1)
>>> trees.classify(myTree,labels,[1,0])
Traceback (most recent call last):File "<pyshell#96>", line 1, in <module>trees.classify(myTree,labels,[1,0])File "C:\Users\34856\Desktop\trees.py", line 92, in classifyreturn classLabel
UnboundLocalError: local variable 'classLabel' referenced before assignment
>>>
================== RESTART: C:\Users\34856\Desktop\trees.py ==================
>>> import trees
>>> import treePlotter
>>> myDat,labels=trees.createDataSet()
>>> myTree = treePlotter.retrieveTree(1)
>>> trees.classify(myTree,labels,[1,0])
Traceback (most recent call last):File "<pyshell#101>", line 1, in <module>trees.classify(myTree,labels,[1,0])File "C:\Users\34856\Desktop\trees.py", line 92, in classifyreturn classLabel
UnboundLocalError: local variable 'classLabel' referenced before assignment
>>>
================== RESTART: C:\Users\34856\Desktop\trees.py ==================
>>> import trees
>>> import treePlotter
>>> myDat,labels=trees.createDataSet()
>>> myTree = treePlotter.retrieveTree(1)
>>>
>>> trees.classify(myTree,labels,[1,0])
Traceback (most recent call last):File "<pyshell#107>", line 1, in <module>trees.classify(myTree,labels,[1,0])File "C:\Users\34856\Desktop\trees.py", line 90, in classifyclassLabel = classify(secondDict[key],featLabels,testVec)File "C:\Users\34856\Desktop\trees.py", line 90, in classifyclassLabel = classify(secondDict[key],featLabels,testVec)File "C:\Users\34856\Desktop\trees.py", line 86, in classifyfeatIndex = featLabels.index(firstStr)
ValueError: 'head' is not in list
>>> myTree = treePlotter.retrieveTree(1)
>>> myTree = treePlotter.retrieveTree(0)
>>> trees.classify(myTree,labels,[1,0])
'no'
>>> trees.classify(myTree,labels,[1,1])
'yes'
>>> trees.classify(myTree,labels,[1,2])
Traceback (most recent call last):File "<pyshell#112>", line 1, in <module>trees.classify(myTree,labels,[1,2])File "C:\Users\34856\Desktop\trees.py", line 90, in classifyclassLabel = classify(secondDict[key],featLabels,testVec)File "C:\Users\34856\Desktop\trees.py", line 92, in classifyreturn classLabel
UnboundLocalError: local variable 'classLabel' referenced before assignment
>>> trees.classify(myTree,labels,[0,0])
'no'
>>> trees.classify(myTree,labels,[0,1])
'no'
>>>
================== RESTART: C:\Users\34856\Desktop\trees.py ==================
>>> trees.storeTree(myTree,'classifierStorage.txt')
Traceback (most recent call last):File "<pyshell#115>", line 1, in <module>trees.storeTree(myTree,'classifierStorage.txt')
NameError: name 'trees' is not defined
>>> import trees
>>> trees.storeTree(myTree,'classifierStorage.txt')
Traceback (most recent call last):File "<pyshell#117>", line 1, in <module>trees.storeTree(myTree,'classifierStorage.txt')
NameError: name 'myTree' is not defined
>>> myTree = treePlotter.retrieveTree(0)
Traceback (most recent call last):File "<pyshell#118>", line 1, in <module>myTree = treePlotter.retrieveTree(0)
NameError: name 'treePlotter' is not defined
>>> import treePlotter
>>> myTree = treePlotter.retrieveTree(0)
>>> trees.storeTree(myTree,'classifierStorage.txt')
Traceback (most recent call last):File "<pyshell#121>", line 1, in <module>trees.storeTree(myTree,'classifierStorage.txt')File "C:\Users\34856\Desktop\trees.py", line 97, in storeTreepickle.dump(inputTree,fw)
TypeError: write() argument must be str, not bytes
>>>
================== RESTART: C:\Users\34856\Desktop\trees.py ==================
>>> import trees
>>> import treePlotter
>>> myTree = treePlotter.retrieveTree(0)
>>> trees.storeTree(myTree,'classifierStorage.txt')
>>> trees.grabTree('classifierStorage.txt')
Traceback (most recent call last):File "<pyshell#126>", line 1, in <module>trees.grabTree('classifierStorage.txt')File "C:\Users\34856\Desktop\trees.py", line 103, in grabTreereturn pickle.load(fr)
UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 0: illegal multibyte sequence
>>>
================== RESTART: C:\Users\34856\Desktop\trees.py ==================
>>> import trees
>>> import treePlotter
>>> myTree = treePlotter.retrieveTree(0)
>>> trees.storeTree(myTree,'classifierStorage.txt')
>>> trees.grabTree('classifierStorage.txt')
{'no surfacing': {0: 'no', 1: {'flippers': {0: 'no', 1: 'yes'}}}}
>>>
>>> fr = open('lenses.txt')
>>> lenses = [list.strip().split('\t')for inst in fr.readline()]
Traceback (most recent call last):File "<pyshell#134>", line 1, in <module>lenses = [list.strip().split('\t')for inst in fr.readline()]File "<pyshell#134>", line 1, in <listcomp>lenses = [list.strip().split('\t')for inst in fr.readline()]
AttributeError: type object 'list' has no attribute 'strip'
>>> lenses = [inst.strip().split('\t')for inst in fr.readline()]
>>> lensesLabels = ['age','perscript','astigmatic','tearRate']
>>> lensesTree = trees.creatrTree(lenses,lensesLabels)
Traceback (most recent call last):File "<pyshell#137>", line 1, in <module>lensesTree = trees.creatrTree(lenses,lensesLabels)
AttributeError: module 'trees' has no attribute 'creatrTree'
>>> lensesTree = trees.createTree(lenses,lensesLabels)
Traceback (most recent call last):File "<pyshell#138>", line 1, in <module>lensesTree = trees.createTree(lenses,lensesLabels)
AttributeError: module 'trees' has no attribute 'createTree'
>>> lensesTree = trees.createTrees(lenses,lensesLabels)
Traceback (most recent call last):File "<pyshell#139>", line 1, in <module>lensesTree = trees.createTrees(lenses,lensesLabels)File "C:\Users\34856\Desktop\trees.py", line 69, in createTreesreturn majorityCnt(classList)File "C:\Users\34856\Desktop\trees.py", line 60, in majorityCntsortedClassCount = sorted(classCount.iteritems(),\
AttributeError: 'dict' object has no attribute 'iteritems'
>>>
================== RESTART: C:\Users\34856\Desktop\trees.py ==================
>>> import trees>>> import treePlotter>>> myTree = treePlotter.retrieveTree(0)>>> trees.storeTree(myTree,'classifierStorage.txt')>>> trees.grabTree('classifierStorage.txt'){'no surfacing': {0: 'no', 1: {'flippers': {0: 'no', 1: 'yes'}}}}
>>> fr = open('lenses.txt')>>> lenses = [list.strip().split('\t')for inst in fr.readline()]Traceback (most recent call last):File "<pyshell#146>", line 1, in <module>lenses = [list.strip().split('\t')for inst in fr.readline()]File "<pyshell#146>", line 1, in <listcomp>lenses = [list.strip().split('\t')for inst in fr.readline()]
AttributeError: type object 'list' has no attribute 'strip'
>>> lenses = [inst.strip().split('\t')for inst in fr.readline()]>>> lensesLabels = ['age','perscript','astigmatic','tearRate']>>> lensesTree = trees.creatrTree(lenses,lensesLabels)Traceback (most recent call last):File "<pyshell#149>", line 1, in <module>lensesTree = trees.creatrTree(lenses,lensesLabels)
AttributeError: module 'trees' has no attribute 'creatrTree'
>>> lensesTree = trees.createTrees(lenses,lensesLabels)>>> lensesTree'o'
>>> treePlotter.createPlot(lensesTree)Traceback (most recent call last):File "<pyshell#152>", line 1, in <module>treePlotter.createPlot(lensesTree)File "C:\Users\34856\Desktop\treePlotter.py", line 77, in createPlotplotTree.totalW = float(getNumLeafs(inTree))File "C:\Users\34856\Desktop\treePlotter.py", line 18, in getNumLeafsfirstSides = list(myTree.keys())
AttributeError: 'str' object has no attribute 'keys'
>>> myDat,labels=trees.createDataSet()>>> 

机器学习实战——决策树Python实现问题记录相关推荐

1. python神经网络算法pdf_Python与机器学习实战 决策树、集成学习、支持向量机与神经网络算法详解及编程实现.pdf...

   作 者 :何宇健 出版发行 : 北京:电子工业出版社 , 2017.06 ISBN号 :978-7-121-31720-0 页 数 : 315 原书定价 : 69.00 主题词 : 软件工具-程序设计 ...

2. 机器学习实战中的函数学习记录

   title: 机器学习实战中的函数学习记录 date: 2020-05-01 09:20:50 tags: [python函数] categories: 机器学习实战 更多内容请关注我的博客 记录机器 ...

3. 机器学习实战--决策树ID3的构建、画图与实例：预测隐形眼镜类型

   声明 本文参考了<机器学习实战>书中代码,结合该书讲解,并加之自己的理解和阐述 机器学习实战系列博文 机器学习实战--k近邻算法改进约会网站的配对效果 机器学习实战--决策树的构建.画图与 ...

4. 机器学习实战笔记(Python实现)-04-Logistic回归

   转自:机器学习实战笔记(Python实现)-04-Logistic回归 转自:简单多元线性回归(梯度下降算法与矩阵法) 转自:人工神经网络(从原理到代码) Step 01 感知器 梯度下降

5. 机器学习实战-决策树-22

   机器学习实战-决策树-叶子分类 import numpy as np import pandas as pd import seaborn as sns import matplotlib.pyplo ...

6. 机器学习实战 —— 决策树（完整代码）

   声明: 此笔记是学习<机器学习实战> -- Peter Harrington 上的实例并结合西瓜书上的理论知识来完成,使用Python3 ,会与书上一些地方不一样. 机器学习实战-- 决策 ...

7. [机器学习数据挖掘]机器学习实战决策树plotTree函数完全解析

   [机器学习&数据挖掘]机器学习实战决策树plotTree函数完全解析 http://www.cnblogs.com/fantasy01/p/4595902.html点击打开链接 import ...

8. 机器学习实战-决策树（二）Python实现

   转载请注明作者和出处: http://blog.csdn.net/c406495762 运行平台: Windows Python版本: Python3.x IDE: Sublime text3 一 前 ...

9. [机器学习实战]决策树

   1. 简介 决策树(Decision Tree)是在已知各种情况发生概率的基础上,通过构成决策树来求取净现值的期望值大于等于零的概率,评价项目风险,判断其可行性的决策分析方法,是直观运用概率分析的一种 ...

最新文章

1. 机器翻译注意力机制及其PyTorch实现
2. c语言实现memcpy
3. eci转换ci公式_原文提供的置信区间不是95%，如何转换？
4. Oracle 10GR2+ASM在OEL上的安装（VMware Server 1.0）
5. 仙剑4按键取钱的东东。
6. 《吃土》读书笔记-笔记初稿
7. ArcGIS实验教程——实验二十五：大型商场选址经典案例
8. 导出MySql中的数据库 --Linux/Windows
9. nullnullc++ 精简版 fps限制
10. HDU-4310 Hero 贪心Or动态规划
11. 基于Promethues与Grafana的Greenplum分布式数据库监控的实现
12. 《STL源码分析》学习笔记 — STL概论与版本简介
13. 【学习笔记】噬菌体学
14. TNS-12547和TNS-12555错误解决
15. android 网易新闻 登录界面,Android实现仿网易新闻主界面设计
16. C++生成简单WAV文件（三）——根据简谱生成菊花台
17. Flutter3引用原生播放器-IOS(Swift)篇
18. 关闭flash助手推荐的广告
19. CompletableFuture.thenCompose
20. 深度学习pytorch常见编程技巧

热门文章

1. Docker,compose,kitematic Overview and build Php WordExpress
2. io端口与ion内存
3. 海底捞月战法实战讲解
4. play框架用起来（3）
5. 期货反跟单-侃侃人工反跟单那些事儿
6. Redit集群搭建-Sentinel模式搭建
7. 数据仓库(二) 数仓理论（重点核心）
8. 漫谈国内外Android生态：华为发布的 HMS 服务，对 Mate30 系列无法搭载 Google GMS 的补偿有多大(本人原创)
9. leap smear是什么
10. 【SSL 1458】zzzyyds（DP）