Metadata-Version: 2.1
Name: pythonic-config
Version: 0.5.1
Summary: UNKNOWN
Home-page: UNKNOWN
Author: Michael Petrochuk
Author-email: petrochukm@gmail.com
License: MIT
Description: # Config
        
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        This package allows you to configure functions explicitly and safely. You will be able to create an
        intuitive type-checked configuration file that directly sets function arguments, globally.
        
        This is a lightweight package with only two widely used dependencies and only a couple hundred line
        of code.
        
        #### Contents
        
        - [Config](#config)
              - [Contents](#contents)
          - [Install](#install)
          - [Usage 🤗](#usage-)
            - [Configuring a function](#configuring-a-function)
            - [Writing a configuration file](#writing-a-configuration-file)
            - [Configuring via the command line](#configuring-via-the-command-line)
            - [Logging the configuration](#logging-the-configuration)
            - [Advanced: Sharing configurations between processes](#advanced-sharing-configurations-between-processes)
            - [Advanced: Ensuring the configuration is used](#advanced-ensuring-the-configuration-is-used)
          - [How does this work?](#how-does-this-work)
        
        ## Install
        
        Make sure you have Python 3, then you can install `pythonic-config` using `pip`:
        
        ```bash
        pip install pythonic-config
        ```
        
        Install the latest code via:
        
        ```bash
        pip install git+https://github.com/PetrochukM/Config.git
        ```
        
        ## Usage 🤗
        
        ### Configuring a function
        
        Any function can be configured, and then used anywhere, see below:
        
        ```python
        import config
        
        # Define function
        def do_something_cool(how_many_times: int):
            pass
        
        # Configure function
        config.add({do_something_cool: config.Args(how_many_times=5)})
        
        # Use the configured function anywhere! 🎉
        do_something_cool(how_many_times=config.get())
        ```
        
        This approach is simple but powerful. Now, each configuration can be directly attributed to a
        documented function argument.
        
        Furthermore, `config` incorporates `typeguard` 💂‍♀️ so every configuration is type checked at runtime.
        
        ### Writing a configuration file
        
        The simple example above can be extended to create a configuration file, for example:
        
        ```python
        import config
        import data
        import train
        
        config.add({
          data.get_data: config.Args(
              train_data_path="url_lists/all_train.txt",
              val_data_path="url_lists/all_val.txt"
          ),
          data.dataset_reader: config.Args(
              type_="cnn_dm",
              source_max_tokens=1022,
              target_max_tokens=54,
          ),
          train.make_model: config.Args(type_="bart"),
          train.Trainer.make_optimizer: config.Args(
              type_="huggingface_adamw",
              lr=3e-5,
              correct_bias=True
          )
          train.Trainer.__init__: config.Args(
              num_epochs=3,
              learning_rate_scheduler="polynomial_decay",
              grad_norm=1.0,
          )
        })
        ```
        
        With this approach, this configuration file will make it clear which (hyper)parameters are set and
        where. This improves overall readability of the configuration file.
        
        🐍 Last but not least, the configuration file is written in Python, you can use variables, lambdas,
        etc to further modularize.
        
        ### Configuring via the command line
        
        In case you want to change one variable at a time, this package supports configuration from the
        command line, for example:
        
        ```console
        python example.py --sorted='Args(reverse=True)'
        ```
        
        ```python
        import sys
        import config
        
        config.add(config.parse_cli_args(sys.argv[1:]))
        ```
        
        ### Logging the configuration
        
        Lastly, it's useful to track the configuration file by logging it. This package supports that
        via `config.log`. In the example below, we log the configuration to
        [Comet](https://www.comet.ml/).
        
        ```python
        from comet_ml import Experiment
        import config
        
        experiment = Experiment()
        experiment.log_parameters(config.log())
        ```
        
        ### Advanced: Sharing configurations between processes
        
        In multiprocessing, it may be useful to share the configuration file between processes. In this
        case, the configuration can be exported to another process and then subsequently imported, see
        below:
        
        ```python
        from multiprocessing import Process
        import config
        
        def handler(configs: config.Config):
            config.add(configs)
        
        if __name__ == "__main__":
            process = Process(target=handler, args=(config.export(),))
            process.start()
            process.join()
        ```
        
        ### Advanced: Ensuring the configuration is used
        
        In a large code base, it might be hard to tell if the configuration has been set for every function
        call. In this case, we've exposed `config.trace` which can double check every function call
        against the configuration, see below:
        
        ```python
        import sys
        import config
        
        def configured(a=111):
            pass
        
        sys.settrace(config.trace)
        config.add({configured: config.Args(a=1)})
        
        configured()  # `config.trace` issues a WARNING!
        configured(a=config.get())
        ```
        
        We also have another option for faster tracing with `enable_fast_trace`. Instead of a system wide
        trace, this will inject new code into the `__code__` of every function in your configuration for
        tracing. This has much lower overhead; however, it is still in beta due to the number of edge cases.
        
        ## How does this work?
        
        Our approach is simple, `config` maintains a global configuration mapping each function to its
        associated arguments. When a user calls `config.get`, it'll attempt to parse the code to determine
        the calling function and associated argument. In most cases, this will be successful and it will
        fetch the appropriate value. If it's not successful, it'll `raise` an error that'll help you fix
        the issue.
        
Keywords: python config configurable configuration hparams
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Education
Classifier: Intended Audience :: Science/Research
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Topic :: Scientific/Engineering
Classifier: Topic :: Scientific/Engineering :: Mathematics
Classifier: Topic :: Scientific/Engineering :: Artificial Intelligence
Classifier: Topic :: Software Development
Classifier: Topic :: Software Development :: Libraries
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Requires-Python: >=3.7
Description-Content-Type: text/markdown
