1.python3 下報錯：’dict’ object has no attribute ‘iteritems’

python2 下為 .iteritems()
python3 下為 .items()

a={'1':1,'2':2}
a.items()
Out[26]: dict_items([('2', 2), ('1', 1)])

2.python3下報錯.TypeError: ‘dict_keys’ object does not support indexing

如果使用的是python2

firstStr = myTree.keys()[0]

LZ使用的是python3

firstSides = list(myTree.keys())
firstStr = firstSides[0]

3.python3報錯：pickle.dump(inputTree,fw) TypeError: write() argument must be str, not bytes

python序列化儲存物件到檔案時出錯
python2：

import pickle
fw = open(filename,'w')
pickle.dump(inputTree,fw)
fw.close()

python3：

def storeTree(inputTree,filename)
 
:
    import pickle
    fw = open(filename,'wb')
    pickle.dump(inputTree,fw)
    fw.close()

def grabTree(filename):
    import pickle
    fr = open(filename,'rb')
    return pickle.load(fr)