python Programming Glossary: composite

SQLAlchemy: Relation table with composite primary key

http://stackoverflow.com/questions/10525797/sqlalchemy-relation-table-with-composite-primary-key

Relation table with composite primary key I have a set of tables that look like workflows.. key points are those I mentioned in the comments proper composite ForeignKey s correct relationship configuration using the FKs..

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

could use get_by_key_name to fetch one or more of these composite key names and if you get one or more not None values you know..

psycopg2 mapping Python : “list of dicts” to Postgres : “array of composite type” for an INSERT statement

http://stackoverflow.com/questions/11957925/psycopg2-mapping-python-list-of-dicts-to-postgres-array-of-composite-type

&ldquo list of dicts&rdquo to Postgres &ldquo array of composite type&rdquo for an INSERT statement Postgres version 9.1.x... says Changed in version 2.4.3 added support for array of composite types . The documentation only shows examples of SELECT statements... from the documentation Adaptation from Python tuples to composite types is automatic instead and requires no adapter registration...

http://stackoverflow.com/questions/1624257/django-or-similar-for-composite-primary-keys

or similar for composite primary keys I am writing a web application for my engineering.. primary key column and place a unique index on your domain composite key. Foreign keys will then refer to the surrogate primary key..

In Python, is it better to use list comprehensions or for-each loops?

http://stackoverflow.com/questions/2849645/in-python-is-it-better-to-use-list-comprehensions-or-for-each-loops

clearer. If the iteration is executed in order to build a composite value then list comprehensions are usually more readable. ..

With the Python Imaging Library (PIL), how does one compose an image with an alpha channel over another image?

http://stackoverflow.com/questions/3374878/with-the-python-imaging-library-pil-how-does-one-compose-an-image-with-an-alp

share improve this question I couldn't find an alpha composite function in PIL so here is my attempt at implementing it with.. it with numpy import numpy as np import Image def alpha_composite src dst ''' Return the alpha composite of src and dst. Parameters.. Image def alpha_composite src dst ''' Return the alpha composite of src and dst. Parameters src PIL RGBA Image object dst PIL..

Finding the nth prime number using Python

http://stackoverflow.com/questions/3885937/finding-the-nth-prime-number-using-python

get a skewed jacked output all not prime titles for my is_composite variable my test_num is giving me prime and composite numbers.. is_composite variable my test_num is giving me prime and composite numbers and my prime_count is off Some of the answers that developers.. are the numbers that are being tested for primality is_composite 'not prime' # will be counted by prime_count prime_count 0 #count..

Simple Prime Generator in Python

http://stackoverflow.com/questions/567222/simple-prime-generator-in-python

Generate an infinite sequence of prime numbers. # Maps composites to primes witnessing their compositeness. # This is memory.. numbers. # Maps composites to primes witnessing their compositeness. # This is memory efficient as the sieve is not run forward.. in previous iterations # yield q D q q q else # q is composite. D q is the list of primes that # divide it. Since we've reached..

Multiple columns index when using the declarative ORM extension of sqlalchemy

http://stackoverflow.com/questions/6626810/multiple-columns-index-when-using-the-declarative-orm-extension-of-sqlalchemy

index True b Column String 32 index True if you'd like a composite index again Table is present here as usual you just don't have..

How to “scale” a numpy array?

http://stackoverflow.com/questions/7525214/how-to-scale-a-numpy-array

product numpy.kron Computes the Kronecker product a composite array made of blocks of the second array scaled by the first..

Convert RGBA PNG to RGB with PIL

http://stackoverflow.com/questions/9166400/convert-rgba-png-to-rgb-with-pil

edges due to semi transparent areas. You should use alpha_composite_with color instead. Source http stackoverflow.com a 9166671.. r g b a return Image.fromarray x 'RGBA' def alpha_composite front back Alpha composite two RGBA images. Source http stackoverflow.com.. x 'RGBA' def alpha_composite front back Alpha composite two RGBA images. Source http stackoverflow.com a 9166671 284318..