推荐学习书目
› Learn Python the Hard Way
Python Sites
› PyPI - Python Package Index
› http://diveintopython.org/toc/index.html
› Pocoo
值得关注的项目
› PyPy
› Celery
› Jinja2
› Read the Docs
› gevent
› pyenv
› virtualenv
› Stackless Python
› Beautiful Soup
› 结巴中文分词
› Green Unicorn
› Sentry
› Shovel
› Pyflakes
› pytest
Python 编程
› pep8 Checker
Styles
› PEP 8
› Google Python Style Guide
› Code Style from The Hitchhiker's Guide
这是一个创建于 2389 天前的主题，其中的信息可能已经有所发展或是发生改变。
如何动态构建 query,
有时候要写个 demo server,所以用了 tinydb 这个库，但是有一个问题，如何动态构造 query 呢？
querys = []
for name in ("a", "b","c", "d"):
val = self.get_argument(name,"")
if val:
querys.append(where(name)==val)
list=db.search(querys)
有没有了办法实现上面那种效果呢？
 |
1
nbboy 2018-05-28 17:19:31 +08:00  1
太小众了把。
|
 |
2
louisganlu 2018-05-30 16:09:39 +08:00 1
http://tinydb.readthedocs.io/en/latest/usage.html
The second, traditional way of constructing queries is as follows: >>> from tinydb import where >>> db.search(where('field') == 'value') Using where('field') is a shorthand for the following code: >>> db.search(Query()['field'] == 'value') Accessing nested fields with this syntax can be achieved like this: >>> db.search(where('birthday').year == 1900) >>> db.search(where('birthday')['year'] == 1900) |
Select Language