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例子报错是什么回事

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独孤泠然July

#1 Created at ... [Delete] [Delete and Lock User] 
L = []
L.append(r'<?xml version="1.0"?>')
L.append(r'<root>')
L.append(encode('some & data'))
L.append(r'</root>')
print(''.join(L))

Traceback (most recent call last):
  File "/Users/lynn/Desktop/PY/Hello.py", line 34, in <module>
    L.append(encode('some & data'))
NameError: name 'encode' is not defined

谢知福

#2 Created at ... [Delete] [Delete and Lock User]

encode不是这么用的

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