【tablib cell() missing 1 required positional argument: 'column' 报错】的更多相关文章

tablib cell() missing 1 required positional argument: 'column' 报错

可能是安装版本问题 pip uninstall tablib, 重新安装 pip install tablib==0.11.4. 试一试…

missing 1 required positional argument: 'on_delete'报错解决方案

最近在使用Python的Django框架开发web站点,通过models.py文件建表后,执行数据库迁移(命令行:mange.py makemigrations)时报错,下面是查看官方文档后找到的解决方案. 官方文档:Model field reference 报错内容: class Guest(models.Model): File "C:\Users\dell\guest\sign\models.py", line 18, in Guest event = models.Forei…

Python：XXX missing X required positional argument: 'self'

代码的一个小小Bug有时候会让人焦头烂额,费了很大劲搞明白的问题,如果不记录下来,是很容易遗忘的! 定义一个类,如果按照以下的方式使用,则会出现TypeError: testFunc() missing 1 required positional argument: 'self'.如果认真细究的话,笔者曾反复修改参数,但是于事无补. 在Python中,应该先对类进行实例化,然后在应用类,如下图所示.注意,实例化的过程是应该待括号的. 总结:Python中,类应该先实例化,然后再使用类!…

Django在根据models生成数据库表时报 __init__() missing 1 required positional argument: 'on_delete'

from django.db import models # Create your models here. class Category(models.Model): caption = models.CharField(max_length=) class ArticleType(models.Model): caption = models.CharField(max_length=) class Article(models.Model): title = models.CharFie…

Django在根据models生成数据库表时报错： __init__() missing 1 required positional argument: 'on_delete'

原因: 在django2.0后,定义外键和一对一关系的时候需要加on_delete选项,此参数为了避免两个表里的数据不一致问题,不然会报错:TypeError: __init__() missing 1 required positional argument: 'on_delete'举例说明:user=models.OneToOneField(User)owner=models.ForeignKey(UserProfile)需要改成:user=models.OneToOneField(User…

Django关联数据库时报错TypeError: __init__() missing 1 required positional argument: 'on_delete'

sgrade = models.ForeignKey("Grades",) 执行python manage.py makemigrations后出现TypeError: __init__() missing 1 required positional argument: 'on_delete'缺少一个参数  'on_delete'加上就好了sgrade = models.ForeignKey("Grades",on_delete=models.CASCADE,)…

Django2.1在根据models生成数据库表时报 __init__() missing 1 required positional argument: 'on_delete'

解决办法: a=models.ForeignKey('BookInfo',on_delete=models.CASCADE,) 即在外键值的后面加上 on_delete=models.CASCADE 原因: 在django2.0后,定义外键和一对一关系的时候需要加on_delete选项,此参数为了避免两个表里的数据不一致问题,不然会报错:TypeError: __init__() missing 1 required positional argument: 'on_delete'举例说明:us…

Django报错：__init__() missing 1 required positional argument: 'on_delete'

原因: 在django2.0后,定义外键和一对一关系的时候需要加on_delete选项,此参数为了避免两个表里的数据不一致问题,不然会报错:TypeError: __init__() missing 1 required positional argument: 'on_delete'举例说明:user=models.OneToOneField(User)owner=models.ForeignKey(UserProfile)需要改成:user=models.OneToOneField(User…

Django2.0之后使用外键时遇到 __init__() missing 1 required positional argument: 'on_delete'

1.Django2.0之后使用外键时遇到 __init__() missing 1 required positional argument: 'on_delete' 需要在外键创建时给on_delete参数赋值.models.CASCADE是老版本的默认值. publish = models.ForeignKey("Publish", on_delete=models.CASCADE)…

Django问题 TypeError: __init__() missing 1 required positional argument: 'on_delete'

问题:在执行python manage.py makemigrations learning_logs时,系统会报错,提示:TypeError: __init__() missing 1 required positional argument: 'on_delete' (ll_env) c:\WorkSpace\SimpleTest\learning_log>python manage.py makemigrations learning_logsTraceback (most recent…