操作步骤： pip2.7 install w3lib python2.7 from w3lib.html import remove_tags a="""["<a href='/cluster/app/application_1514348141878_2816407'>application_1514348141878_2816407</a>","aaaaaa","com.aaa.sem.LandPageCount2","SPARK","root.aaa_aaaaa_group","55680","1539600524933","0","RUNNING","UNDEFINED","<br title='10.0'> <div class='ui-progressbar ui-widget ui-widget-content ui-corner-all' title='10.0...
我有一个查询,产生一个ID,然后是一个计数.我只想获取那些计数为N的行.我尝试了以下代码,但出现“错误：列“ cert_count”不存在“.我想我使用的标签有误吗？cust_cert_counts = db.session.query(CustomerCertAssociation.customer_id,func.count(CustomerCertAssociation.certification_id).label('cert_count')).filter(CustomerCertAssociation.certification_id.in_(cert_ids)).group_by(CustomerCertAssociation.customer_id)...
我正在尝试在sqlalchemy的hading子句中使用标签,但是在使它工作时遇到了问题.我正在尝试这样的事情：qry = db.session.query(Foo.id,Foo.name,(Foo.max_stuff - func.sum(Bar.stuff)).label('rstuff') ).join(Bar) .group_by(Foo.id) .having('rstuff' >= "some_data_passed_in_by_customer")for res in qry.all(): print res但是得到错误：sqlalchemy.exc.ArgumentError: having() argument must be of type sqlalchemy.sql.Cla...
我如何将这样的内容翻译成SQLAlchemy？select x - y as difference...我知道怎么做：x.label('foo')…但我不确定在哪里放置“.label()”方法调用如下：select ([table.c.x - table.c.y], ...解决方法:ColumnElement方法只是一个帮手; label()可以按照以下方式使用：select([sql.expression.label('foo', table.c.x - table.c.y), ...])
我正在尝试使用关联代理进行标记,与the example in the docs非常相似.这是我的模式的一个子集(它是一个博客),使用声明：class Tag(Base):__tablename__ = 'tags'id = Column(Integer, primary_key=True)tag = Column(Unicode(255), unique=True, nullable=False)class EntryTag(Base):__tablename__ = 'entrytags'entry_id = Column(Integer, ForeignKey('entries.id'), key='entry', primary_key=True)...