Cannot use ImageField because Pillow is not installed

在django的models.py在有如下代码， 执行python manage.py runserver后报错：

class Article(models.Model):

title = models.CharField(max_length=200)

content = models.TextField()

url = models.URLField()

portal = models.ImageField()

author = models.ForeignKey(Author)

ERRORS:

blog.Article.portal: (fields.E210) Cannot use ImageField because Pillow is not installed.

HINT: Get Pillow at https://pypi.python.org/pypi/Pillow or run command "pip install Pillow".

提示要安装Pillow,经查Pillow是python的一个图像处理库，下面进行安装

安装装Pillow

pip install --use-wheel Pillow #安装最新的Pillow

安装完成，再次运行发现问题解决。

注：

卸载Pillow

pip uninstall Pillow