学习python的错误总结
1. No module named “MySQLdb”
解决办法:你没有安装MySQLdb,去安装下http://mysql-python.sourceforge.net/ 官方网站
http://sourceforge.net/projects/mysql-python/files/ 这里可以直接下到相关的文件。
2. NoReverseMatch at/
’url’requires a non-empty first argument.The syntax changed in Django1.5.See the docs
解决办法:路径:diango1.5版本路径需要加引号。即可解决上述问题。
例如:{% url “new_index”%}。
3. DjangoUnicodeDecodeError at/
解决办法:项目路径出现中文的问题。
4. NoReverseMatch at/
Reverse for’news_index’ with arguments ‘()’ and keyword arguments ‘{}’ not found
解决办法:这种问题是没有正确的设置路径导致。这个可以先检查settings里的路径然后再检查其他子的app的路径。
5. OperationalError at/
(2003,‘Can’t connect to MySQL server on ‘localhost’(10061)’)
解决办法:这个问题是因为mysql数据库没有打开。
6. TypeError at/news/
Unsupported opeaand type(s) for-:’unicode’ and ‘int’
解决办法:加了一个类型转换 把unicode转换成int ;
例如:int(u’2’)。
7. ImportError: cannot import name Role
解决办法:from Manager.Role.models import Role在引用的地方查看路径是否正确。
8. NameError: name 'true' is not defined
Unhandled exception in thread started by <bound method Command.inner_run of <django.core.management.commands.runserver.Command object at 0x02BDF870>>
Traceback (most recent call last):
File "C:\Python27\lib\site-packages\django\core\management\commands\runserver.py", line 92, in inner_run
self.validate(display_num_errors=True)
File "C:\Python27\lib\site-packages\django\core\management\base.py", line 280, in validate
num_errors = get_validation_errors(s, app)
File "C:\Python27\lib\site-packages\django\core\management\validation.py", line 35, in get_validation_errors
for (app_name, error) in get_app_errors().items():
File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 166, in get_app_errors
self._populate()
File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 72, in _populate
self.load_app(app_name, True)
File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 96, in load_app
models = import_module('.models', app_name)
File "C:\Python27\lib\site-packages\django\utils\importlib.py", line 35, in import_module
__import__(name)
File "F:\workplacepython\HBS_Photographer\Manager\News\models.py", line 10, in <module>
class News(models.Model):
File "F:\workplacepython\HBS_Photographer\Manager\News\models.py", line 14, in News
AddTime=models.DateTimeField(u'添加时间',auto_now_add=true)
NameError: name 'true' is not defined
解决办法:AddTime=models.DateTimeField(u'添加时间',auto_now_add=True)原因是小写的true改成大写字母True就可以了。
9. CommandError: One or more models did not validate:
CommandError: One or more models did not validate:
Photo.photo: 'FileFormat_ID' has a relation with model 图片格式id, which has either not been installed or is abstract.
Photo.photo: 'PhotoGrapherID' has a relation with model <class 'Manager.Photographer.models.PhotoGrapher'>, which has either not been installed or is abstract.
Other.collect: 'Photo_ID' has a relation with model 图片ID, which has either not been installed or is abstract.
解决办法:
Q1.Photo.photo: 'FileFormat_ID' has a relation with model 图片格式id, which has either not been installed or is abstract。
A1:把FileFormat_ID=models.ForeignKey(u’文件格式ID’,FileFormat)改成FileFormat_ID=models.ForeignKey(FileFormat)。
Q2:Photo.photo: 'PhotoGrapherID' has a relation with model <class 'Manager.Photographer.models.PhotoGrapher'>, which has either not been installed or is abstract.
A1:在settings里加 'Manager.Photographer'。
Q3:Other.collect: 'Photo_ID' has a relation with model 图片ID, which has either not been installed or is abstract.
A3: Photo_ID=models.ForeignKey(u’图片ID’,Photo)改成 Photo_ID=models.ForeignKey(Photo)