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A small library for managing deep learning models, hyper parameters and datasets

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A small library for configuring modular applications.


pip install zookeeper


The fundamental building blocks of Zookeeper are components. The @component decorator is used to turn classes into components. These component classes can have configurable parameters, which are declared using class-level type annotations (in a similar way to Python dataclasses). These parameters can be Python objects or nested sub-components, and need not be set with a default value.

For example:

from zookeeper import component

class ChildComponent:
    a: int                  # An `int` parameter, with no default set
    b: str = "foo"          # A `str` parameter, which by default will be `foo`

class ParentComponent:
    a: int                  # The same `int` parameter as the child
    child: ChildComponent   # A nested component parameter, of type `ChildComponent`

After instantiation, components can be 'configured' with a configuration dictionary, containing values for a tree of nested parameters. This process automatically injects the correct values into each parameter.

If a child sub-component declares a parameter which already exists in some containing parent, then it will pick up the value that's set on the parent, unless a 'scoped' value is set on the child.

For example:

from zookeeper import configure

p = ParentComponent()

        "a": 5,
        "child.a": 4,

>>> 'ChildComponent' is the only concrete component class that satisfies the type
>>> of the annotated parameter 'ParentComponent.child'. Using an instance of this
>>> class by default.


>>> ParentComponent(
>>>     a = 5,
>>>     child = ChildComponent(
>>>         a = 4,
>>>         b = "foo"
>>>     )
>>> )

Tasks and the CLI

The @task decorator is used to define Zookeeper tasks and can be applied to any class that implements an argument-less run method. Such tasks can be run through the Zookeeper CLI, with parameter values passed in through CLI arguments (configure is implicitly called).

For example:

from zookeeper import cli, task

class UseChildA:
    parent: ParentComponent
    def run(self):

class UseParentA(UseChildA):
    def run(self):

if __name__ == "__main__":

Running the above file then gives a nice CLI interface:

python use_child_a
>>> ValueError: No configuration value found for annotated parameter 'UseChildA.parent.a' of type 'int'.

python use_child_a a=5
>>> 5

python use_child_a a=5 child.a=3
>>> 3

python use_parent_a a=5 child.a=3
>>> 5

Using Zookeeper to define Larq or Keras experiments

See examples/ for an example of how to use Zookeeper to define all the necessary components (dataset, preprocessing, and model) of a Larq experiment: training a BinaryNet on CIFAR-10. This example can be easily adapted to other Larq or Keras models and other datasets.

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