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A utility that makes it easy to use dot notation with python dictionaries

Project description

Todos

  • [ ] merge python2.7 version with python3
  • [ ] make another package called tardigrade

Installation

pip install waterbear # unfortuantely, tardigrade wouldn't work.

Usage

For more usage examples, take a look at the test.py!

There are two classes, the Bear and the DefaultBear. Default Bear allows you to pass in a default factory as the first argument. Bear allows you do do so via a keyword argument __default

Example usage below:

# Waterbear is a bear!
from waterbear import Bear

waterbear = Bear(**{"key": 100})
assert waterbear.key == 100, 'now waterbear.key is accessible!'
assert waterbear['key'] == 100, 'item access syntax is also supported!'

Similar to collection.defaultdict, there is DefaultBear

bear = DefaultBear(None, a=10, b=100)
assert vars(bear) == {'a': 10, 'b': 100}

assert bear.does_not_exist is None, "default value works"

and it also supports default factories

bear = DefaultBear(tuple, a=10, b=100)
assert bear.does_not_exist is (), "default factory also works!"

You can also use it with vars, str, print(repr), dict etc.

bear = Bear(a=10, b=100)
assert str(bear) == "{'a': 10, 'b': 100}"
assert dir(bear) == ['a', 'b']
assert list(iter(bear)) == ['a', 'b']
assert dict(bear) == {'a': 10, 'b': 100}

More Usages Could be Found in test.py!

test_dict = {
    'a': 0,
    'b': 1
}

# Use spread operators to construct with a dictionary!
test_args = Bear(**test_dict)
assert test_args.a == 0
assert test_args.b == 1
# the value should now be accessible through the key name.
test_args.haha = 0
assert test_args.haha == 0


# You can also use a nested dictionary.
test_args.haha = {'a': 1}
assert test_args.haha != {'a': 1}
assert vars(test_args.haha) == {'a': 1}
assert test_args.haha.a == 1
assert test_args.__dict__['haha']['a'] == 1
assert vars(test_args)['haha']['a'] == 1
assert str(test_args) == "{'a': 0, 'b': 1, 'haha': {'a': 1}}", \
    'test_args should be this value "{\'a\': 0, \'b\': 1, \'haha\': {\'a\': 1}}"'

# To set recursion to false, use this `__recursive` parameter.
test_args = Bear(__recursive=False, **test_dict)
assert test_args.__is_recursive == False
assert test_args.a == 0
assert test_args.b == 1
test_args.haha = {'a': 1}
assert test_args.haha['a'] == 1
assert test_args.haha == {'a': 1}

# Some other usage patterns
test_args = Bear(**test_dict, **{'ha': 'ha', 'no': 'no'})
assert test_args.ha == 'ha', 'key ha should be ha'

To Develop

git clone https://github.com/episodeyang/waterbear.git
cd waterbear
make dev

This make dev command should build the wheel and install it in your current python environment. Take a look at the https://github.com/episodeyang/waterbear/Makefile for details.

To publish, first update the version number, then do:

make publish

* image credit goes to BBC waterbear: The Smallest Bear! 😛 tardigrade

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