python-platonic · anatoly-scherbakov · Jan 26, 2020 · Jan 26, 2020
diff --git a/.idea/misc.xml b/.idea/misc.xml
diff --git a/.idea/platonic.iml b/.idea/platonic.iml
diff --git a/README.md b/README.md
@@ -1,6 +1,5 @@
 # platonic
 
-[![wemake.services](https://img.shields.io/badge/%20-wemake.services-green.svg?label=%20&logo=data%3Aimage%2Fpng%3Bbase64%2CiVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAABGdBTUEAALGPC%2FxhBQAAAAFzUkdCAK7OHOkAAAAbUExURQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP%2F%2F%2F5TvxDIAAAAIdFJOUwAjRA8xXANAL%2Bv0SAAAADNJREFUGNNjYCAIOJjRBdBFWMkVQeGzcHAwksJnAPPZGOGAASzPzAEHEGVsLExQwE7YswCb7AFZSF3bbAAAAABJRU5ErkJggg%3D%3D)](https://wemake.services)
 [![Build Status](https://travis-ci.com/python-platonic/platonic.svg?branch=master)](https://travis-ci.com/python-platonic/platonic)
 [![Coverage](https://coveralls.io/repos/github/python-platonic/platonic/badge.svg?branch=master)](https://coveralls.io/github/python-platonic/platonic?branch=master)
 [![Python Version](https://img.shields.io/pypi/pyversions/platonic.svg)](https://pypi.org/project/platonic/)

diff --git a/platonic-amazon-s3/Makefile b/platonic-amazon-s3/Makefile
diff --git a/platonic-amazon-s3/README.md b/platonic-amazon-s3/README.md
diff --git a/platonic-amazon-s3/platonic_amazon_s3/__init__.py b/platonic-amazon-s3/platonic_amazon_s3/__init__.py
diff --git a/platonic-amazon-s3/platonic_amazon_s3/iterators.py b/platonic-amazon-s3/platonic_amazon_s3/iterators.py
diff --git a/platonic-amazon-s3/setup.py b/platonic-amazon-s3/setup.py
diff --git a/platonic-amazon-s3/tests/test_init.py b/platonic-amazon-s3/tests/test_init.py
diff --git a/platonic-redis/Makefile b/platonic-redis/Makefile
diff --git a/platonic-redis/README.md b/platonic-redis/README.md
diff --git a/platonic-redis/platonic_redis/__init__.py b/platonic-redis/platonic_redis/__init__.py
diff --git a/platonic-redis/platonic_redis/base.py b/platonic-redis/platonic_redis/base.py
diff --git a/platonic-redis/platonic_redis/redis_box.py b/platonic-redis/platonic_redis/redis_box.py
diff --git a/platonic-redis/platonic_redis/redis_mapping.py b/platonic-redis/platonic_redis/redis_mapping.py
diff --git a/platonic-redis/platonic_redis/redis_mutable_mapping.py b/platonic-redis/platonic_redis/redis_mutable_mapping.py
diff --git a/platonic-redis/setup.py b/platonic-redis/setup.py
diff --git a/platonic-redis/tests/test_box.py b/platonic-redis/tests/test_box.py
diff --git a/platonic-redis/tests/test_initialize.py b/platonic-redis/tests/test_initialize.py
diff --git a/platonic/Makefile b/platonic/Makefile
diff --git a/platonic/README.md b/platonic/README.md
diff --git a/platonic/__init__.py b/platonic/__init__.py
@@ -1 +1,5 @@
-# -*- coding: utf-8 -*-
+from .model import Model
+
+# Data structures
+from .mapping.mapping import Mapping as Mapping
+from .mutable_mapping.mutable_mapping import MutableMapping
diff --git a/platonic/platonic/mapping/__init__.py → platonic/mapping/__init__.py b/platonic/platonic/mapping/__init__.py → platonic/mapping/__init__.py
diff --git a/platonic/mapping/mapping.py b/platonic/mapping/mapping.py
@@ -0,0 +1,53 @@
+import typing
+from abc import ABC
+
+from ..model import Model
+
+
+KeyType = typing.TypeVar('KeyType')
+ValueType = typing.TypeVar('ValueType')
+
+
+class Mapping(Model, typing.Mapping[KeyType, ValueType], ABC):
+    KeyType: type
+    ValueType: type
+
+    def __class_getitem__(cls, args: typing.Tuple[type, type]) -> type:
+        if (
+            # We have to check the types of arguments here to ensure
+            # the structure is used properly. mypy does not condone that.
+            not isinstance(args, tuple)   # type: ignore
+            or len(args) != 2
+        ):
+            raise TypeError(
+                f'Class {cls.__name__} requires exactly two type arguments, '
+                f'Key type and Value type. For example:'
+                f'\n'
+                f'  {cls.__name__}[str, int]\n'
+                f'\n'
+                f'means a mapping from strings to integers. Instead, the type '
+                f'arguments are: {args}.'
+            )
+
+        key_type, value_type = args
+
+        if not isinstance(key_type, type):
+            raise ValueError(
+                f'Key type {key_type} is a {type(key_type)} value; '
+                f'a type expected.'
+            )
+
+        if not isinstance(value_type, type):
+            raise ValueError(
+                f'Value type {value_type} is a {type(value_type)} value; '
+                f'a type expected.'
+            )
+
+        return type(
+            f'{cls.__name__}[{key_type.__name__}, {value_type.__name__}]',
+            (cls, ),
+            {
+                'KeyType': key_type,
+                'ValueType': value_type
+            }
+        )
diff --git a/platonic/model.py b/platonic/model.py
@@ -0,0 +1,8 @@
+from abc import ABC
+
+
+PROXY_CLASS_ATTRIBUTE = '__is_proxy_class'
+
+
+class Model(ABC):
+    pass
diff --git a/...onic/platonic/mutable_mapping/__init__.py → platonic/mutable_mapping/__init__.py b/...onic/platonic/mutable_mapping/__init__.py → platonic/mutable_mapping/__init__.py
@@ -1,2 +1 @@
 from .mutable_mapping import MutableMapping
-from .dict_mapping import DictMapping
Original file line number	Diff line number	Diff line change
		@@ -1,2 +1 @@
		from .mutable_mapping import MutableMapping
		from .dict_mapping import DictMapping