Python/HTML: Unicode解码错误

Question

我正在开发一个使用Python的Flask网页应用，可能这个问题和Flask没什么关系。我遇到了一个错误：UnicodeDecodeError: 'utf8' codec can't decode byte 0xe8 in position 5: invalid continuation byte。我在文件顶部加了# -*- coding: utf-8 -*-，但还是出现同样的错误。这是代码的一部分：

s+="Searching results for: \"%s \"<br><br>".encode("utf-8") % (pattern)

    for i in orderedList[0:10]:
        a=a+1
        res=(SC.dictionaryMemory.get(i))

        try:
            resString= ', '.join(res)
        except:
            print("Chyba!")

        with open('somefile.txt', 'a') as the_file:
            the_file.write(resString)

        s+="<b>%s: </b>%s,<br>".decode("utf-8") % (i, resString.decode("utf-8"))

    return (s.decode("utf-8") if (len(orderedList)>0) else "Nebyli nalezeny zadne vyrazy.".encode("utf-8")))

这是我在网页上看到的错误信息：

File "C:\Python27\lib\site-packages\flask\app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Python27\lib\site-packages\flask\app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "C:\Python27\lib\site-packages\flask\app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Python27\lib\site-packages\flask\app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "C:\Python27\lib\site-packages\flask\app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Python27\lib\site-packages\flask\app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Python27\lib\site-packages\flask\app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Python27\lib\site-packages\flask\app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "D:\workspace\AproximateSearchPython2\WebApp.py", line 74, in search
s+="<b>%s: </b>%s,<br>".decode("utf-8") % (i, resString.decode("utf-8"))
File "C:\Python27\lib\encodings\utf_8.py", line 16, in decode
return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe8 in position 5: invalid continuation byte

我认为问题出在resString的内容上。在somefile.txt文件里是这样的：

společné, obecný, veřejný, společný, prostý, obyčejný, obvyklý, obecný, společný, běľný

你能给我一些建议吗？

补充：我把解码改成了编码，但同样的问题又出现了。

File "C:\Python27\lib\site-packages\flask\app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Python27\lib\site-packages\flask\app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "C:\Python27\lib\site-packages\flask\app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Python27\lib\site-packages\flask\app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "C:\Python27\lib\site-packages\flask\app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Python27\lib\site-packages\flask\app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Python27\lib\site-packages\flask\app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Python27\lib\site-packages\flask\app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "D:\workspace\AproximateSearchPython2\WebApp.py", line 75, in search
s+="<b>%s: </b>%s,<br>".encode("utf-8") % (i, resString.encode("utf-8"))
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe8 in position 5: invalid continuation byte

error handling unicode web development string manipulation flask text encoding

Python/HTML: Unicode解码错误

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