namedtuples are immutable, performant and classy. namedtupled is a lightweight wrapper for recursively creating namedtuples from nested dicts, lists, json and yaml. Inspired by hangtwenty.
pip install namedtupledimport namedtupled
data = {'binks': {'says': 'meow'}}
cat = namedtupled.map(data)
cat # NT(binks=NT(says='meow'))
cat.binks.says # 'meow'Create namedtuples with methods: map, json, yaml, zip, env and helper method ignore. Unpack nested namedtuples with reduce.
Optionally name namedtuples by passing a ‘name’ argument to any method, the default name is simply ‘NT’.
data = {'binks': {'says': 'meow'}}
cat = namedtupled.map(data, name='Cat')
cat # Cat(binks=NT(says='meow'))Recursively convert mappings like nested dicts, or lists of dicts, into namedtuples.
args: mapping, name=‘NT’
From dict:
data = {'binks': {'says': 'meow'}}
cat = namedtupled.map(data)
cat.binks.says # 'meow'From list:
data = [{'id': 'binks', 'says': 'meow'}, {'id': 'cedric', 'says': 'prrr'}]
cats = namedtupled.map(data)
cats[1].says # 'prrr'Recursively convert nested namedtuples to mappings.
args: obj
cat # NT(binks=NT(says='meow'))
data = namedtupled.reduce(cat)
data # {'binks': {'says': 'meow'}}Map namedtuples from json data.
args: data=None, path=None, name=‘NT’
Inline:
data = """{"binks": {"says": "meow"}}"""
cat = namedtupled.json(data)
cat.binks.says # 'meow'Or specify path for a json file:
cat = namedtupled.json(path='cat.json')
cat.binks.says # 'meow'Map namedtuples from yaml data.
args: data=None, path=None, name=‘NT’
Inline:
data = """
binks:
says: meow
"""
cat = namedtupled.yaml(data)
cat.binks.says # 'meow'Or specify path for a yaml file:
cat = namedtupled.yaml(path='cat.yaml')
cat.binks.says # 'meow'Map namedtuples given a pair of key, value lists.
args: keys=[], values=[], name=‘NT’
Example:
keys, values = ['id', 'says'], ['binks', 'prrr']
cat = namedtupled.zip(keys, values)
cat.says # 'prrr'Returns a namedtuple from a list of environment variables. If not found in shell, gets input with input or getpass.
args: keys=[], name=‘NT’, use_getpass=False
In shell:
export USERNAME="binks"
export APIKEY="c4tnip!"Then in python:
variables = ['USERNAME', 'APIKEY']
env = namedtupled.env(variables)
env.USERNAME # 'binks'Use ignore to prevent a mapping from being converted to a namedtuple.
args: mapping
Example usage:
data = {'binks': namedtupled.ignore({'says': 'meow'})}
cat = namedtupled.map(data)
cat.binks # {'says': 'meow'}Issues and PRs welcome, tests run with:
pip install pytest pytest-cov pytest-datafiles
python -m pytest --cov=namedtupled/ tests