tri.named_struct supplies classes that can be used like dictionaries, but with a predefined set of possible key values.
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 AttributeErrorDefault 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')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 == 42You need tox installed then just make test.
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