SQLAlchemy
What's the best language/technique to perform advanced data cleansing and formatting on a SQL/MySQL/PostgreSQL table?
We have a bunch of utility scripts in Visual FoxPro, which we use to interactively cleanse/format data.We\'d like to start migrating this code to make use of other database platforms, like MySQL or SQ[详细]
2023-04-11 13:22 分类:问答Python, SqlAlchemy: Many to many relationship, find those without
Say I have two types of objects, Movies and Tags, related by the ORM in a many to many relationship with an association table indicated by the secondary argument to relationship(), and I want to be ab[详细]
2023-04-11 13:18 分类:问答Python / SQLAlchemy - load relation when foreign key is updated?
I have a class: class Chart(Base): __tablename__ = \'chart\' id = C(\'chart_id\', Integer, primary_key=True)[详细]
2023-04-11 12:00 分类:问答Python, SQLAlchemy: Query, filter and return value
Say I run a query with a filter, Session.query(model.Place).join(model.Location).filter(model.Location.great_circle_distance(location) < r)[详细]
2023-04-11 05:33 分类:问答converting native SQL to SQLAlchemy
I\'ve got the following problen: I know SQL and I don\'t know how to work with SQLAlchemy but I ne开发者_开发知识库ed to change it in 1 place in the project that I\'ve inherited.[详细]
2023-04-11 02:24 分类:问答AttributeError: 'InstrumentedList' object has no attribute
I have these tables tables: class Thing(Base): __tablename__ = \'thing\' id = Column(Integer, primary_key=True)[详细]
2023-04-10 21:15 分类:问答sqlalchemy exists for query
How do I check whether data in a query exists? For example: users_query = User.query.filter_by(email=\'x@x.com\')[详细]
2023-04-10 18:24 分类:问答Strange ClassNotMappedError with sqlalchemy and Python
I\'m building a rather simple model using sqlalchemy, using a many-to-many relationship defined by an association table and two classes that are to be associated using the declarative syntax.[详细]
2023-04-10 12:16 分类:问答How to use simple sqlalchemy calls while using thread/multiprocessing
Problem I am writing a program that reads a set of documents from a corpus (each line is a document). Each document is processed using a function processdocument, assigned a unique ID, and then writt[详细]
2023-04-10 03:12 分类:问答Is it possible to use a namedtuple with SQLalchemy?
I have been trying to get a namedtuple to work with SQLalchemy, but to no avail.. Web search hasn\'t been very illuminating and I\'m new with Python and SQLalchemy so I\'m not really sure if I\'m chas[详细]
2023-04-09 23:12 分类:问答