popo

POPO

Define everything using POPOs (Plain Old Python Object), then you can easily use it from SQLAlchemy ORM, Protobuf3, and so on.

Wanted Goals

• Python 3
• $ popo input.py
  • -> input.sqla.py
  • -> input.proto
• POPO input files just work as normal python file
• Pipeline:
  • Read Input
  • Convert to Own DataTypes
  • Target Factories
  • Outputs

Wanted Types

• Python Default Types
  • Numeric thingy: Integer, Float, Double, ...
  • String
  • List
  • Bytes
• DateTime
• Enum
• ...

Wanted Targets

• SQLAlchemy ORM
• Protobuf
• ...

Wanted Features

• Versioning
  • SQLAlchemy will cover this by alembic
  • Protobuf need to consider this
    • read olders and managing the
• Targets Factory and Configurable Targets? (custom type converter?)
  • want to export with
    • sqlalchemy-utils
    • protobuf3
• Prefix/Postfix naming
• ...

Resolved Question

• PEP 484 - Type Hints?
  • Nope, it's not for class defining.
• How to get parse tree of python?
  • ast: "designed to generate an abstract syntax tree and ignores all comments and formatting"
  • parser: "internal code parser, which is optimized to generate byte code and too low level"
  • lib2to3: "high level and contains all formatting, but that doesn’t mean it’s easy to use"
    • Why don't you just make 2to3 fixer for converting those?
      • I don't think 2to3 is not for it.
    • how to get the parse tree form lib2to3?
      • lib2to3.pgen2, but it's for python2 (maybe)
        • oops, our target is python3
  • yo yo yo yo yo!!! We don't need to parse! We just used class.
    • So Class.__dict__() and instanceof() will cover all.
      • really? dive it now!
        • import popo-input
        • dir(popo-input)
        • .__dict__
        • .

Unresolved Questions

• Is really needed? helpful?
• How to ...
  • save datetime @ protobuf?
    • maybe timestamp and timezone.
  • manage the build?
  • name exported output?
  • limit the type of contents?
  • limit the size of string with this?
    • using comment? (noooooooooo..)
    • using
  • manage the metadata of input/output source code?
    • why need it?
      • ...
• Where is the gap for adding versioning process.
• No Private / Forgien Key?!
• Nested Class!
• Alphabetical Order Class Contents?!!!
• How to save the order of input, and keep it as output?!!!!!!!!!! <- currently biggest mission blocker (lib2to3 needed?)

TODO

• .gitignore

Milestone

1. Set the clear blueprint for v0.0.0 (due: 151115)
   • minimum wanted-types:
     • integer
     • string
     • ?
   • 2 targets
     • sqlalchemy
     • protobuf
   • 1 feature
     • target factory
   • Goal: directory design
   • Goal: pipeline design
2. ...