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所以现在我使用python 3.4我的代码无法正常工作。我从cStringIO导入，现在我修复了它出现意外的错误。在Python 3.4中使用StringIO
继承人我的错误：
Traceback:
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/core/handlers/base.py" in get_response
111. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/contrib/admin/options.py" in wrapper
567. return self.admin_site.admin_view(view)(*args, **kwargs)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/utils/decorators.py" in _wrapped_view
105. response = view_func(request, *args, **kwargs)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/views/decorators/cache.py" in _wrapped_view_func
52. response = view_func(request, *args, **kwargs)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/contrib/admin/sites.py" in inner
204. return view(request, *args, **kwargs)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/contrib/admin/options.py" in add_view
1437. return self.changeform_view(request, None, form_url, extra_context)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/utils/decorators.py" in _wrapper
29. return bound_func(*args, **kwargs)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/utils/decorators.py" in _wrapped_view
105. response = view_func(request, *args, **kwargs)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/utils/decorators.py" in bound_func
25. return func.__get__(self, type(self))(*args2, **kwargs2)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/db/transaction.py" in inner
394. return func(*args, **kwargs)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/contrib/admin/options.py" in changeform_view
1388. self.save_model(request, new_object, form, not add)
File "/home/callumb/webapps/photo/lib/python3.4/Django-1.7-py3.4.egg/django/contrib/admin/options.py" in save_model
1029. obj.save()
File "/home/callumb/webapps/photo/app/images/models.py" in save
77. self.create_thumbnail()
File "/home/callumb/webapps/photo/app/images/models.py" in create_thumbnail
50. image = Image.open(StringIO(self.image.read()))
Exception Type: TypeError at /admin/images/image/add/
Exception Value: initial_value must be str or None, not bytes
这里是代码：
def create_thumbnail(self):
if not self.image:
return
from PIL import Image
from io import StringIO, BytesIO
from django.core.files.uploadedfile import SimpleUploadedFile
import os
THUMBNAIL_SIZE = (280, 600)
DJANGO_TYPE = self.image.file.content_type
if DJANGO_TYPE == 'image/jpeg':
PIL_TYPE = 'jpeg'
FILE_EXTENSION = 'jpg'
elif DJANGO_TYPE == 'image/png':
PIL_TYPE = 'png'
FILE_EXTENSION = 'png'
image = Image.open(StringIO(self.image.read()))
image.thumbnail(THUMBNAIL_SIZE, Image.ANTIALIAS)
temp_handle = StringIO()
image.save(temp_handle, PIL_TYPE)
temp_handle.seek(0)
suf = SimpleUploadedFile(os.path.split(self.image.name)[-1],
temp_handle.read(), content_type=DJANGO_TYPE)
self.thumbnail.save(
'%s_thumbnail.%s' % (os.path.splitext(suf.name)[0], FILE_EXTENSION),
suf,
save=False
)