anson.py3 0.2.3

Anson for Python3

Anson.py3

Json (de)serialize module in Python 3.

from ansons.anson import Anson

Install from testpypi

pip install anson.py3

Guide

• Mapping Java vs Python package structure

Python packages tree is in format of path/to/module/class, while java has no node of module:

├── io
│   └── oz
│       ├── jserv
│       │   └── docs
│       │       └── syn
│       │           └── singleton.py "class AppSettings"
│       └── syn.py "class AnRegistry, SynodeConfig, SynOrg, YellowPages"

Java packages tree:

.
└── io
    └── oz
        └── jserv
            └── docs
                └── syn
                    ├── singleton
                    │   └── AppSettings.java

.
└── io
    └── oz
        └── syn
            ├── AnRegistry.java
            ├── SynodeConfig.java
            ├── SynOrg.java
            └── YellowPages.java

Anson.py3 is using package name path with a top level path. Say, if the json envelope define as

{ type: io.oz.syn.AnRegistry,
  ...
}

and the user's project tree is:

src
├── io
│   └── oz
│       ├── jserv
│       │   └── docs
│       │       └── syn
│       │           └── singleton.py "class AppSettings"
│       └── syn.py "class AnRegistry, SynodeConfig, SynOrg, YellowPages"
main.py

In main.py, call

Anson.java_src('src')

before

AnRegistry.from_file(path)

Issues

• Printing Anson subclasses with non-default field without value initialization will result in errors

If SynOrg.parent is defined as

class SynOrg(Anson)
    parent: str

    def __init__(self):
        super().__init__()

org = Anson.from_file(...)
print (org)

Error
Traceback (most recent call last):
  File "/home/antson/py3/test/testYellowPages.py", line 18, in testAnregistry
    print(diction)
  File "/usr/lib/python3.12/dataclasses.py", line 262, in wrapper
    result = user_function(self)
             ^^^^^^^^^^^^^^^^^^^
  File "<string>", line 3, in __repr__
  File "/usr/lib/python3.12/dataclasses.py", line 262, in wrapper
    result = user_function(self)
             ^^^^^^^^^^^^^^^^^^^
  File "<string>", line 3, in __repr__
  File "/usr/lib/python3.12/dataclasses.py", line 262, in wrapper
    result = user_function(self)
             ^^^^^^^^^^^^^^^^^^^
  File "<string>", line 3, in __repr__
AttributeError: 'SynOrg' object has no attribute 'parent'

References

• https://packaging.python.org/en/latest/tutorials/packaging-projects/

python3 -m twine upload --repository testpypi dist/*

Troubleshootings

.pypirc

[testpypi]
repository: https://test.pypi.org/legacy/
username = __token__
password = pypi-zzz

python3 -m twine --version
twine version 6.1.0 (keyring: 25.6.0, packaging: 24.2, requests: 2.31.0, requests-toolbelt: 1.0.0,
urllib3: 2.0.7, id: 1.5.0)
python3 -m build
python3 -m twine upload --repository testpypi dist/*

ERROR   InvalidDistribution: Invalid distribution metadata: unrecognized or malformed field
        'license-file'; unrecognized or malformed field 'license-expression'  

Install twine 6.1.0 and packaging 24.

pip install packaging -U

See issue #1216.