python Programming Glossary: transactions

http://stackoverflow.com/questions/10210080/how-to-disable-sqlalchemy-caching

to persist data to the database. During this time other transactions in progress elsewhere will not see this data. However due to.. not see this data. However due to the isolated nature of transactions there's an extra twist. Those other transactions in progress.. nature of transactions there's an extra twist. Those other transactions in progress will not only not see your transaction's data until..

when to commit data in ZODB

http://stackoverflow.com/questions/11254384/when-to-commit-data-in-zodb

with the ZODB as a tool you need to understand how ZODB transactions work and how to use them. Why your ZODB grows so large First.. versions of larger and larger PersistentList instances as transactions are committed. Removing the old data is called packing which.. your data file considerably as the partial lists in older transactions are removed. Do note that packing is an expensive operation..

What is an efficent way of inserting thousands of records into an SQLite table using Django?

http://stackoverflow.com/questions/1136106/what-is-an-efficent-way-of-inserting-thousands-of-records-into-an-sqlite-table-u

. http docs.djangoproject.com en dev topics db transactions #django db transaction commit manually So it would be something..

How do I define a unique property for a Model in Google App Engine?

http://stackoverflow.com/questions/1185628/how-do-i-define-a-unique-property-for-a-model-in-google-app-engine

to duplicate values. To prevent this you will have to use transactions Transactions Google App Engine If you're looking to check for.. looking to check for uniqueness across all entities with transactions you'd have to put all of them in the same group using the first.. the first method which would be very inefficient. For transactions use the second method like this class UniqueConstraint db.Model..

How do I do database transactions with psycopg2/python db api?

http://stackoverflow.com/questions/1219326/how-do-i-do-database-transactions-with-psycopg2-python-db-api

do I do database transactions with psycopg2 python db api Im fiddling with psycopg2 and while.. ... cursor.execute 'update ... etc.' db.commit So how do transactions work with psycopg2 How would I set change the isolation level..

SQLAlchemy: What's the difference between flush() and commit()?

http://stackoverflow.com/questions/4201455/sqlalchemy-whats-the-difference-between-flush-and-commit

aren't persisted permanently to disk or visible to other transactions until the database receives a COMMIT for the current transaction..

Django vs web2py for a beginner developer [closed]

http://stackoverflow.com/questions/4352428/django-vs-web2py-for-a-beginner-developer

support for multiple database connections distributed transactions and more . For me the most important functionality of web2py..

Google AppEngine: how to count a database's entries beyond 1000?

http://stackoverflow.com/questions/795817/google-appengine-how-to-count-a-databases-entries-beyond-1000

counter to that entity and if there are lots of transactions a sharded counter. See http code.google.com appengine articles..

Scraping dynamic content in a website

http://stackoverflow.com/questions/8323728/scraping-dynamic-content-in-a-website

stories. The less polite option would be to trace the HTTP transactions that take place while the page is loading and work out which..

Feedback on using Google App Engine? [closed]

http://stackoverflow.com/questions/110186/feedback-on-using-google-app-engine

How do I define a unique property for a Model in Google App Engine?

http://stackoverflow.com/questions/1185628/how-do-i-define-a-unique-property-for-a-model-in-google-app-engine

values. To prevent this you will have to use transactions Transactions Google App Engine If you're looking to check for uniqueness..

Django cache.set() causing duplicate key error

http://stackoverflow.com/questions/1189541/django-cache-set-causing-duplicate-key-error

else can insert the key between the count and the insert. Transactions don't prevent this. The code appears to expect this and to try..

How do I do database transactions with psycopg2/python db api?

http://stackoverflow.com/questions/1219326/how-do-i-do-database-transactions-with-psycopg2-python-db-api

isolation level. `ISOLATION_LEVEL_SERIALIZABLE` Transactions are run at a ``SERIALIZABLE`` isolation level. .. _transaction..

Threaded Django task doesn't automatically handle transactions or db connections?

http://stackoverflow.com/questions/1303654/threaded-django-task-doesnt-automatically-handle-transactions-or-db-connections

source code I've found the answer to my own question Transactions Django's default autocommit behavior still holds true for my..

How to get started with Big Data Analysis

http://stackoverflow.com/questions/4322559/how-to-get-started-with-big-data-analysis

depth Third realize the following SQL is for Updates and Transactions. When doing analytical processing big or small there's almost..

form.is_valid() always returning false

http://stackoverflow.com/questions/5254470/form-is-valid-always-returning-false

variables Template extends base.html block title Add Transactions endblock block head Add Transactions endblock block content.. block title Add Transactions endblock block head Add Transactions endblock block content form method post action . form.non_field_errors.. field div endfor input type submit value Add Transactions form endblock python django django forms share improve this..

Neural Network based ranking of documents

http://stackoverflow.com/questions/7554873/neural-network-based-ranking-of-documents

the sparsity problem in collaborative filtering. ACM Transactions on Information Systems TOIS 22 1 116 142 2004 ACM. PDF A thesis..