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Ensure nested dictionary structure.

Project description


Ever have JSON or a large dictionary that you want to validate before you jump deeper into it? PyChecKey allows you to check a dictionary-like object against a defined structure.

This works with Python 3.5+.


Below are the components and common examples of how to use them.


A KeyEnsurer allows checking against a dictionary-like structure.

from pycheckey import KeyEnsurer

data = {
    "key1": 4,
    "key2": {
        "innerKey": "hi"

ensurer = KeyEnsurer(data=data, required_keys=['key1', 'key2.innerKey', 'key3'])

ensurer.validate()  # Will return false because key3 does not exist!
print(ensurer.missing)  # ['key3']

ensurer.key_exists(data, 'key2.inner')  # Returns true because data[key2][inner] exists

Local Development

To work on this repository, you need virtualenv. Clone it first, then run the following two commands.

$ virtualenv -p python3 venv
$ source venv/bin/activate

Running Tests

Run pytest from the root directory to run all tests.


Run pylint from the root directory to lint the code files.

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