UnicodeDecodeError : 'ascii' codec can't decode byte 0xe0 in position 0: ordinal not in range(128)
Question
On one of my machines I have the error when I am working with google apps engine or django.
For example:
app.yaml
application: demas1252c version: 1 runtime: python api_version: 1 handlers: - url: /images static_dir: images - url: /css static_dir: css - url: /js static_dir: js - url: /.* script: demas1252c.pydemas1252c.py
import cgi import wsgiref.handlers from google.appengine.ext.webapp import template from google.appengine.ext import webapp class MainPage(webapp.RequestHandler): def get(self): values = {'id' : 10} self.response.out.write(template.render('foto.html', values)) application = webapp.WSGIApplication([('/', MainPage)], debug = True) wsgiref.handlers.CGIHandler().run(application)foto.html
<!DOCTYPE html> <html lang="en"> <head></head> <body>some</body> </html>
error message:
C:\artefacts\dev\project>"c:\Program Files\Google\google_appengine\dev_appserver.py" foto-hosting
Traceback (most recent call last):
File "c:\Program Files\Google\google_appengine\dev_appserver.py", line 69, in <module>
run_file(__file__, globals())
File "c:\Program Files\Google\google_appengine\dev_appserver.py", line 65, in run_file
execfile(script_path, globals_)
File "c:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver_main.py", line 92, in <module>
from google.appengine.tools import dev_appserver
File "c:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 140, in <module>
mimetypes.add_type(mime_type, '.' + ext)
File "C:\Python27\lib\mimetypes.py", line 344, in add_type
init()
File "C:\Python27\lib\mimetypes.py", line 355, in init
db.read_windows_registry()
File "C:\Python27\lib\mimetypes.py", line 260, in read_windows_registry
for ctype in enum_types(mimedb):
File "C:\Python27\lib\mimetypes.py", line 250, in enum_types
ctype = ctype.encode(default_encoding) # omit in 3.x!
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe0 in position 0: ordinal not in range(128)
When I am working with static files in django (without gae) I have very similar error (with different stack).
I tried to find the reason of error and added code to mimetypes.py:
print '====='
print ctype
ctype = ctype.encode(default_encoding) # omit in 3.x!
Then I get next messages in my console:
=====
video/x-ms-wvx
=====
video/x-msvideo
=====
рєфшю/AMR
Traceback (most recent call last):
In the registry HKCR/Mime/Database/ContentType/ I have five keys with russian (cyrilic) letters. But how can I fix this error?
5 answers
solution1
75 ACCPTED 2010-11-21 13:58:45
This is a bug in mimetypes , triggered by bad data in the registry. ( рєфшю/AMR is not at all a valid MIME media type.)
ctype is a registry key name returned by _winreg.EnumKey , which mimetypes is expecting to be a Unicode string, but it isn't. Unlike _winreg.QueryValueEx , EnumKey returns a byte string (direct from the ANSI version of the Windows API; _winreg in Python 2 doesn't use the Unicode interfaces even though it returns Unicode strings, so it'll never read non-ANSI characters correctly).
So the attempt to .encode it fails with a Unicode Decode Error trying to get a Unicode string before encoding it back to ASCII!
try:
ctype = ctype.encode(default_encoding) # omit in 3.x!
except UnicodeEncodeError:
pass
These lines in mimetypes should simply be removed.
ETA: added to bug tracker .
solution2
8 2013-05-24 16:25:00
By the way, the main culpit of the problem is QuickTime which adds non-ascii mime types to the windows registry. The easiest way to fix it is to manually find and remove from the registry the subsections of the HKCR/Mime/Database/ContentType/ starting with аудио/ and видео/ .
solution3
5 2013-12-08 08:25:50
There is a patch:
http://bugs.python.org/file18143/9291.patch
Works great for me.
Just replace UnicodeEncodeError to be UnicodeError
solution4
4 2014-02-11 02:27:09
An alternative solution from python issue9291 by Alexandr Zarubkin (me21) :
add file named sitecustomize.py in Lib\\site-packages folder.
import sys
sys.setdefaultencoding("cp1251")
solution5
1 2012-09-14 11:10:22
它是在注册表启动regedit中带有拉丁文MIME提示的python错误，并检查“ HKEY_CLASSES_ROOT \\ MIME \\ Database \\ Content Type”中是否存在非拉丁文名称。
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