什么是生成“TypeError字符映射必须返回整数...”在这个Python代码? [英] What is producing "TypeError character mapping must return integer..." in this python code?
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问题描述
当我运行它时,日志说:
return method(* args,** kwargs)
文件C:\ Users \CG\Documents\udacity\rot13serendipo\main.py,第51行,在后
text = rot13(文本)
文件C:\\ \\ User \CG\Documents\udacity\rot13serendipo\main.py,第43行,在rot13
返回st.translate(tab)
TypeError:字符映射必须返回整数,None或unicode
INFO 2012-04-28 20:02:26,862 dev_appserver.py:2891]POST / HTTP / 1.1500 -
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。
这里是我的代码:
import webapp2
form =
< html>
< head>
< title> Unit 2 Rot 13< / title>
< / head>
< body>
< h2>向ROT13输入一些文本:< / h2>
< form method =post>
< textarea name =text
style =height:100px;宽度:400px;>< / textarea>
< br>
< input type =submit>
< / form>
< / body>
< / html>
def rot13(st):
导入字符串
tab1 ='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
tab2 ='nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
tab = string.maketrans(tab1,tab2)
返回st.translate(标签)
class MainHandler(webapp2.RequestHandler):$ b $ (self):
self.response.out.write(form)
def post(self):
text = self.request.get(text )
text = rot13(文本)
self.response.out.write(文本)
app = webapp2.WSGIApplication([('/',MainHandler )],
debug = True)
感谢您的帮助!
解决方案
这可能是因为文本正在进入作为unicode:
>>> def rot13(st):
...导入字符串
... tab1 ='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
... tab2 ='nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
... tab = string。 maketrans(tab1,tab2)
... return st.translate(tab)
...
>>> rot13('test')
'grfg'
>>> rot13(u'test')
Traceback(最近一次调用最后一次):
在< module>中,第1行的文件< stdin>
文件stdin>,第6行,在rot13
TypeError:字符映射必须返回整数,无或unicode
>>>
这个问题涵盖了您需要的内容:
如果您确定unicode字符串不重要,猜你可以:
$ $ p $ code $ return str(st).translate(tab)
please, can someone help me with the code bellow? When I run it the logs said:
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 -
I know the error must be in rot13(). But when I run this procedure in the IDE it works normally.
Here my code:
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)
Thanks in advance for any help!
解决方案
It's probably because the text is being entered as 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
>>>
This question covers what you need:
If you are sure that unicode strings aren't important I guess you could just:
return str(st).translate(tab)
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