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31st Week of 2022

Projects⚑

  • New: Version Update Manager.

    Keeping software updated is not easy because:

    • There are many technologies involved: package managers (apt, yum, pip, yarn, npm, ...), programming languages (python, java, ruby, ...), operative systems (Debian, Ubuntu, ...), deployment technologies (OS install, Docker, Kubernetes, Ansible, Helm), template software (cruft).
    • Each software maintainers use a different version system.
    • Even a small increase in a version may break everything.
    • Sometimes only the latest version is the supported version.
    • It's not easy to check if the update went well.
    • You not only need the desired package to be updated, but also it's dependencies.

    I'd like to find a solution that:

    • Gives an overall insight of the update status of a system.
    • Automates the update process.
    • Support both single system installation or aggregator of multiple systems.

Coding⚑

Python⚑

Python Snippets⚑

  • New: Initialize a dataclass with kwargs.

    If you care about accessing attributes by name, or if you can't distinguish between known and unknown arguments during initialisation, then your last resort without rewriting __init__ (which pretty much defeats the purpose of using dataclasses in the first place) is writing a @classmethod:

    from dataclasses import dataclass
from inspect import signature

@dataclass
class Container:
    user_id: int
    body: str

    @classmethod
    def from_kwargs(cls, **kwargs):
        # fetch the constructor's signature
        cls_fields = {field for field in signature(cls).parameters}

        # split the kwargs into native ones and new ones
        native_args, new_args = {}, {}
        for key, value in kwargs.items():
            if key in cls_fields:
                native_args[key] = value
            else:
                new_args[key] = value

        # use the native ones to create the class ...
        ret = cls(**native_args)

        # ... and add the new ones by hand
        for new_key, new_value in new_args.items():
            setattr(ret, new_key, new_value)
        return ret

    Usage:

    params = {'user_id': 1, 'body': 'foo', 'bar': 'baz', 'amount': 10}
Container(**params)  # still doesn't work, raises a TypeError
c = Container.from_kwargs(**params)
print(c.bar)  # prints: 'baz'

  • New: Replace a substring of a string.

    txt = "I like bananas"

x = txt.replace("bananas", "apples")

Operating Systems⚑

Linux⚑

Linux Snippets⚑

Pipx⚑

  • New: Introduce pipx.

    Pipx is a command line tool to install and run Python applications in isolated environments.

    Very useful not to pollute your user or device python environments.

    Install it with:

    bash pip install pipx