ImportError: cannot import name memoize 1.8-1.9

Question

我有一个错误：

Invalid template library specified. ImportError raised when trying to load 'crispy_forms.templatetags.crispy_forms_field': cannot import name memoize

降级到 1.8 没有帮助

它适用于 Ubuntu 14.04，但不适用于 Win10

• Python2.7
• Django1.9
• django-crispy-forms==1.4.0

Traceback (most recent call last): File "C:\Python27\lib\site-packages\django\core\handlers\base.py", line 149, in get_response response = self.process_exception_by_middleware(e, request) File "C:\Python27\lib\site-packages\django\core\handlers\base.py", line 147, in get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "C:\Internet\DJANG\django19\django19\newsletter\views.py", line 45, in home return render(request, "newsletter/home.html", context) File "C:\Python27\lib\site-packages\django\shortcuts.py", line 67, in render template_name, context, request=request, using=using) File "C:\Python27\lib\site-packages\django\template\loader.py", line 96, in render_to_string template = get_template(template_name, using=using) File "C:\Python27\lib\site-packages\django\template\loader.py", line 26, in get_template engines = _engine_list(using) File "C:\Python27\lib\site-packages\django\template\loader.py", line 143, in _engine_list return engines.all() if using is None else [engines[using]] File "C:\Python27\lib\site-packages\django\template\utils.py", line 110, in all return [self[alias] for alias in self] File "C:\Python27\lib\site-packages\django\template\utils.py", line 101, in __getitem__ engine = engine_cls(params) File "C:\Python27\lib\site-packages\django\template\backends\django.py", line 31, in __init__ options['libraries'] = self.get_templatetag_libraries(libraries) File "C:\Python27\lib\site-packages\django\template\backends\django.py", line 49, in get_templatetag_libraries libraries = get_installed_libraries() File "C:\Python27\lib\site-packages\django\template\backends\django.py", line 131, in get_installed_libraries for name in get_package_libraries(pkg): File "C:\Python27\lib\site-packages\django\template\backends\django.py", line 148, in get_package_libraries "trying to load '%s': %s" % (entry[1], e) InvalidTemplateLibrary: Invalid template library specified. ImportError raised when trying to load 'crispy_forms.templatetags.crispy_forms_field': cannot import name memoize [12/May/2016 18:26:17] "GET / HTTP/1.1" 500 109450

Answer 1

Crispy forms 1.4 已过时。

如果您查看 crispy forms changelog，您可以看到何时添加了对不同 Django 版本的兼容性。

对于 Django 1.8，您需要安装 crispy forms 1.5 或更高版本。

对于 Django 1.9，您需要安装 crispy forms 1.6 或更高版本。

Answer 2

您的 django-crispy-forms 版本已过时，已修复。按 运行 更新：

pip 安装 django-crispy-forms -U