The Leading Python Class Definition Systems

I have been surveying Python class definition systems for awhile and yesterday I watched a webcast of Param and was very impressed. Param is the bottom floor of a very impressive data science / web application development stack that has 100% support from Anaconda. Param was developed for over 10 years in academia.

What other powerful object systems are there besides Param? Pydantic

Pydantic is quite popular but lacks the reactive capabilities that Param, Atom, Traits and Traitlets have. It also is more about type conversion than validation (according to yesterday’s webinar). There is quite a bit of tooling around Pydantic in the form of Pydantic settings (for configuring apps), Pydantic-CLI (and Typer) for command-line interfaces, and Pydantic-SQLAlchemy to make using SQLAlchemy even easier. And FastAPI appears to use it under the hood. And FastAPI is the 3rd most popular web framework in Python behind Django and Flask.

So while numerous object systems are more featureful than Pydantic, another one is much faster

runtypes.

Final Mention for now – CubicWeb

CubicWeb is another object system that comes with a massive infrastructure around it. Even though you define classes similar to these other libraries, are you actually creating a UML relational structure which pumps out CRUD apps and has been doing so for over a decade!

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Declarative User Interfaces for Python

http://enaml.readthedocs.io/en/latest/

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“a” means no

According to TJ. “a” means no.

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“un” means no

TJ says.

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An incomplete sentence is void.

TJ says.

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“pre” means no

“pre” means no according to TJ

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Decree is word fraud

“de” means no

“cree” means contract.

You think decree means to declare.

But it actually means nothing.

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What does discriminate mean?

  1. “dis” means no
  2. “crim” means crime
  3. “nate” means contract
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“dis” means no

as in “dislocated shoulder”

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“propose” is word fraud

“Pro” means no so propose has different meanings to conscious and subconscious.

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