I install pypy and django framework version 1.7.1
我安装pypy和django框架版本1.7.1。
on execute django-admin.py error:
在执行django-admin。py错误:
$ django-admin
Traceback (most recent call last):
File "app_main.py", line 51, in run_toplevel
File "/home/se7en/.virtualenvs/pypyenv/bin/django-admin", line 9, in <module>
load_entry_point('Django==1.7.1', 'console_scripts', 'django-admin')()
File "/home/se7en/.virtualenvs/pypyenv/site-packages/distribute-0.6.24-py2.7.egg/pkg_resources.py", line 337, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/home/se7en/.virtualenvs/pypyenv/site-packages/distribute-0.6.24-py2.7.egg/pkg_resources.py", line 2279, in load_entry_point
return ep.load()
File "/home/se7en/.virtualenvs/pypyenv/site-packages/distribute-0.6.24-py2.7.egg/pkg_resources.py", line 1989, in load
entry = __import__(self.module_name, globals(),globals(), ['__name__'])
File "/home/se7en/.virtualenvs/pypyenv/site-packages/django/core/management/__init__.py", line 11, in <module>
from django.core.management.base import BaseCommand, CommandError, handle_default_options
File "/home/se7en/.virtualenvs/pypyenv/site-packages/django/core/management/base.py", line 17, in <module>
from django.core import checks
File "/home/se7en/.virtualenvs/pypyenv/site-packages/django/core/checks/__init__.py", line 4, in <module>
from .messages import (CheckMessage,
File "/home/se7en/.virtualenvs/pypyenv/site-packages/django/core/checks/messages.py", line 16, in <module>
class CheckMessage(object):
File "/home/se7en/.virtualenvs/pypyenv/site-packages/django/utils/encoding.py", line 36, in python_2_unicode_compatible
klass.__name__)
ValueError: @python_2_unicode_compatible cannot be applied to CheckMessage because it doesn't define __str__().
this error happens on any django version > 1.6
这个错误发生在任何django版本> 1.6中。
1 个解决方案
#1
0
It appears that pypy (emulating Python 2.7) implements __str__ and __unicode__ differently so that '__str__' in klass.__dict__ fails.
看起来pypy(仿真Python 2.7)实现了__str__和__unicode__，从而在klass中实现了“__str__”。__dict__失败。
This causes a failure in "encoding.py" and "html.py" in Django utils. Rewriting these as "try/except" blocks solves the problem (some would argue that this is better style too).
这导致了“编码”的失败。py”和“html。py Django跑龙套。将它们重写为“尝试/除去”块可以解决问题(有些人会认为这也是更好的风格)。
The changes can be seen in the code below:
这些变化可以在下面的代码中看到:
django/utils/encoding.py:
django /跑龙套/ encoding.py:
...
def python_2_unicode_compatible(klass):
"""
A decorator that defines __unicode__ and __str__ methods under Python 2.
Under Python 3 it does nothing.
To support Python 2 and 3 with a single code base, define a __str__ method
returning text and apply this decorator to the class.
"""
if six.PY2:
#if '__str__' not in klass.__dict__:
# raise ValueError("@python_2_unicode_compatible cannot be applied "
# "to %s because it doesn't define __str__()." %
# klass.__name__)
#klass.__unicode__ = klass.__str__
#klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
try:
klass.__unicode__ = klass.__str__
except AttributeError:
raise ValueError("@python_2_unicode_compatible cannot be applied "
"to %s because it doesn't define __str__()." %
klass.__name__)
klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
return klass
...
django/utils/html.py:
django /跑龙套/ html.py:
...
def html_safe(klass):
"""
A decorator that defines the __html__ method. This helps non-Django
templates to detect classes whose __str__ methods return SafeText.
"""
if '__html__' in klass.__dict__:
raise ValueError(
"can't apply @html_safe to %s because it defines "
"__html__()." % klass.__name__
)
if six.PY2:
#if '__unicode__' not in klass.__dict__:
#raise ValueError(
#"can't apply @html_safe to %s because it doesn't "
#"define __unicode__()." % klass.__name__
#)
#klass_unicode = klass.__unicode__
#klass.__unicode__ = lambda self: mark_safe(klass_unicode(self))
#klass.__html__ = lambda self: unicode(self) # NOQA: unicode undefined on PY3
try:
klass_unicode = klass.__unicode__
except AttributeError:
raise ValueError(
"can't apply @html_safe to %s because it doesn't "
"define __unicode__()." % klass.__name__
)
klass.__unicode__ = lambda self: mark_safe(klass_unicode(self))
klass.__html__ = lambda self: unicode(self) # NOQA: unicode undefined on PY3
else:
#if '__str__' not in klass.__dict__:
#raise ValueError(
#"can't apply @html_safe to %s because it doesn't "
#"define __str__()." % klass.__name__
#)
#klass_str = klass.__str__
#klass.__str__ = lambda self: mark_safe(klass_str(self))
#klass.__html__ = lambda self: str(self)
try:
klass_str = klass.__str__
except AttributeError:
raise ValueError(
"can't apply @html_safe to %s because it doesn't "
"define __str__()." % klass.__name__
)
klass.__str__ = lambda self: mark_safe(klass_str(self))
klass.__html__ = lambda self: str(self)
return klass
#1
0
It appears that pypy (emulating Python 2.7) implements __str__ and __unicode__ differently so that '__str__' in klass.__dict__ fails.
看起来pypy(仿真Python 2.7)实现了__str__和__unicode__，从而在klass中实现了“__str__”。__dict__失败。
This causes a failure in "encoding.py" and "html.py" in Django utils. Rewriting these as "try/except" blocks solves the problem (some would argue that this is better style too).
这导致了“编码”的失败。py”和“html。py Django跑龙套。将它们重写为“尝试/除去”块可以解决问题(有些人会认为这也是更好的风格)。
The changes can be seen in the code below:
这些变化可以在下面的代码中看到:
django/utils/encoding.py:
django /跑龙套/ encoding.py:
...
def python_2_unicode_compatible(klass):
"""
A decorator that defines __unicode__ and __str__ methods under Python 2.
Under Python 3 it does nothing.
To support Python 2 and 3 with a single code base, define a __str__ method
returning text and apply this decorator to the class.
"""
if six.PY2:
#if '__str__' not in klass.__dict__:
# raise ValueError("@python_2_unicode_compatible cannot be applied "
# "to %s because it doesn't define __str__()." %
# klass.__name__)
#klass.__unicode__ = klass.__str__
#klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
try:
klass.__unicode__ = klass.__str__
except AttributeError:
raise ValueError("@python_2_unicode_compatible cannot be applied "
"to %s because it doesn't define __str__()." %
klass.__name__)
klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
return klass
...
django/utils/html.py:
django /跑龙套/ html.py:
...
def html_safe(klass):
"""
A decorator that defines the __html__ method. This helps non-Django
templates to detect classes whose __str__ methods return SafeText.
"""
if '__html__' in klass.__dict__:
raise ValueError(
"can't apply @html_safe to %s because it defines "
"__html__()." % klass.__name__
)
if six.PY2:
#if '__unicode__' not in klass.__dict__:
#raise ValueError(
#"can't apply @html_safe to %s because it doesn't "
#"define __unicode__()." % klass.__name__
#)
#klass_unicode = klass.__unicode__
#klass.__unicode__ = lambda self: mark_safe(klass_unicode(self))
#klass.__html__ = lambda self: unicode(self) # NOQA: unicode undefined on PY3
try:
klass_unicode = klass.__unicode__
except AttributeError:
raise ValueError(
"can't apply @html_safe to %s because it doesn't "
"define __unicode__()." % klass.__name__
)
klass.__unicode__ = lambda self: mark_safe(klass_unicode(self))
klass.__html__ = lambda self: unicode(self) # NOQA: unicode undefined on PY3
else:
#if '__str__' not in klass.__dict__:
#raise ValueError(
#"can't apply @html_safe to %s because it doesn't "
#"define __str__()." % klass.__name__
#)
#klass_str = klass.__str__
#klass.__str__ = lambda self: mark_safe(klass_str(self))
#klass.__html__ = lambda self: str(self)
try:
klass_str = klass.__str__
except AttributeError:
raise ValueError(
"can't apply @html_safe to %s because it doesn't "
"define __str__()." % klass.__name__
)
klass.__str__ = lambda self: mark_safe(klass_str(self))
klass.__html__ = lambda self: str(self)
return klass