Question

拜托，有人可以用下面的代码帮我吗？当我运行时，日志说：

return method(*args, **kwargs)
  File "C:\Users\CG\Documents\udacity\rot13serendipo\main.py", line 51, in post
    text = rot13(text)
  File "C:\Users\CG\Documents\udacity\rot13serendipo\main.py", line 43, in rot13
    return st.translate(tab)
TypeError: character mapping must return integer, None or unicode
   INFO     2012-04-28 20:02:26,862 dev_appserver.py:2891] "POST / HTTP/1.1" 500 -

我知道错误必须在rot13（）中。但是，当我在IDE中运行此过程时，它正常工作。

这是我的代码：

import webapp2

form= """
  <html>
  <head>
    <title>Unit 2 Rot 13</title>
  </head>

  <body>
    <h2>Enter some text to ROT13:</h2>
    <form method="post">
      <textarea name="text"
                style="height: 100px; width: 400px;"></textarea>
      <br>
      <input type="submit">
    </form>
  </body>

  </html> """

def rot13(st):
    import string
    tab1 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
    tab2 = 'nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
    tab = string.maketrans(tab1, tab2)
    return st.translate(tab)

class MainHandler(webapp2.RequestHandler):
    def get(self):
        self.response.out.write(form)

    def post(self):
        text = self.request.get("text")
        text = rot13(text)
        self.response.out.write(text)


app = webapp2.WSGIApplication([('/', MainHandler)],
                          debug=True)

提前感谢您的帮助！

Answer 1

这可能是因为文本输入为unicode：

>>> def rot13(st):
...     import string
...     tab1 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
...     tab2 = 'nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
...     tab = string.maketrans(tab1, tab2)
...     return st.translate(tab)
... 
>>> rot13('test')
'grfg'
>>> rot13(u'test')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 6, in rot13
TypeError: character mapping must return integer, None or unicode
>>>

这个问题涵盖了你的需求：

How do I get str.translate to work with Unicode strings?

如果您确定unicode字符串不重要，我猜您可以：

return str(st).translate(tab)

在这个python代码中生成“TypeError字符映射必须返回整数...”的是什么？

1 个答案: