Skip to main content

tri.named-struct supplies a class that can be used like dictionaries (or via attribute access), but with a predefined set of possible key values

Project description

https://travis-ci.org/TriOptima/tri.named-struct.svg?branch=master http://codecov.io/github/TriOptima/tri.named-struct/coverage.svg?branch=master

tri.named_struct

tri.named_struct supplies classes that can be used like dictionaries, but with a predefined set of possible key values.

Example

from tri.named_struct import NamedStruct

class MyNamedStruct(NamedStruct):
    foo = NamedStructField()
    bar = NamedStructField()

m = MyNamedStruct(17, 42)
assert m['foo'] == 17
assert m.foo == 17
assert m == dict(foo=17, bar=42)

m.not_foo  # Will raise an AttributeError

Default values can be provided:

from tri.named_struct import NamedStruct

class MyNamedStruct(NamedStruct):
    foo = NamedStructField()
    bar = NamedStructField()
    baz = NamedStructField(default='default')

assert MyNamedStruct(17) == dict(foo=17, bar=None, baz='default')

Default values can alternatively be provided by a factory method:

from tri.named_struct import NamedStruct

class MyNamedStruct(NamedStruct):
    foo = NamedStructField(default_factory=list)

assert MyNamedStruct().foo == []

There is also a functional way to defined a NamedStruct subclass:

from tri.named_struct import named_struct

MyNamedStruct = named_struct('foo, bar')
m = MyNamedStruct(17, 42)
assert m.foo == 17
assert m.bar == 42

Running tests

You need tox installed then just make test.

License

BSD

Changelog

0.12.0 (2016-08-30)

  • Fix class level override of named struct fields.

0.11.0 (2016-05-06)

  • Fix deafult values shadowing values set explicitly in subclass __init__ method.

0.10.0 (2016-01-12)

  • Added default_factory argument to specify default values via a callback.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
tri.named-struct-0.12.0.tar.gz (5.6 kB) Copy SHA256 hash SHA256 Source None

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page