basic attrs wrapper for nested parsing

.gitignore

@@ -102,3 +102,4 @@ venv.bak/
 
 # mypy
 .mypy_cache/
+.vscode/

README.md

@@ -1,2 +1,9 @@
 # jstruct
+
 JSON to struct to JSON
+
+## Installation
+
+```bash
+pip install -f https://git.io/purplship jstruct
+```

jstruct/__init__.py

@@ -0,0 +1,6 @@
+from jstruct.types import (
+    JStruct,
+    JList,
+    JDict,
+    REQUIRED
+)

jstruct/types.py

@@ -0,0 +1,62 @@
+import attr
+from functools import reduce
+from typing import List, Dict
+
+
+REQUIRED = True
+
+
+@attr.s(auto_attribs=True)
+class _JStruct:
+    def __getitem__(self, arguments):
+        class_, required_, *kwargs = arguments if isinstance(arguments, tuple) else (arguments, False)
+
+        def build(args) -> class_:
+            return class_(**args) if isinstance(args, dict) else args
+        default_ = dict(default=attr.NOTHING if required_ else None)
+        return attr.ib(
+            **default_,
+            converter=build,
+            **dict(reduce(lambda r, d: r + list(d.items()), kwargs, []))
+        )
+
+
+@attr.s(auto_attribs=True)
+class _JList:
+    def __getitem__(self, arguments):
+        class_, required_, *kwargs = arguments if isinstance(arguments, tuple) else (arguments, False)
+
+        def build(args) -> List[class_]:
+            if isinstance(args, list):
+                items = args
+            else:
+                items = [args]
+            return [
+                (class_(**item) if isinstance(item, dict) else item)
+                for item in items
+            ]
+        default_ = dict(default=attr.NOTHING if required_ else [])
+        return attr.ib(
+            **default_,
+            converter=build,
+            **dict(reduce(lambda r, d: r + list(d.items()), kwargs, []))
+        )
+
+
+@attr.s(auto_attribs=True)
+class _JDict:
+    def __getitem__(self, arguments):
+        key_type, value_type, required_, *kwargs = arguments if isinstance(arguments, tuple) else (arguments, False)
+
+        def build(args) -> Dict[key_type, value_type]:
+            return {
+                key_type(key): (value_type(**value) if isinstance(value, dict) else value)
+                for (key, value) in args.items()
+            }
+        default_ = dict(default=attr.NOTHING if required_ else {})
+        return attr.ib(**default_, converter=build, **kwargs)
+
+
+JStruct = _JStruct()
+JList = _JList()
+JDict = _JDict()

setup.py

@@ -0,0 +1,14 @@
+from setuptools import setup
+
+setup(name='jstruct',
+      version='1.0.0',
+      description='Elegant JSON to python Data class',
+      url='https://github.com/DanH91/jstruct',
+      author='DanH91',
+      author_email='danielk.developer@gmail.com',
+      license='MIT',
+      packages=['jstruct'],
+      install_requires=[
+            'attrs==18.2.0'
+      ],
+      zip_safe=False)