From 65f87035727ee05067ef8338dbe11de205a87563 Mon Sep 17 00:00:00 2001
From: lu-wang-g <47436172+lu-wang-g@users.noreply.github.com>
Date: Mon, 2 Dec 2019 14:11:28 -0800
Subject: Flatbuffers Python Object API (#5616)

* Flatbuffers Python Object API

Implement the logic to generate the Python object API that can
unpack the data from a buf class into an object class, and pack
the data of an object class to a buf class.

* Fix the build issues

Remove unused parameters and replace auto in the for-loop statement
with std::string to make it compatible with VS2010.

* Fix the build issues.

* Add support for Array type

Added logic to handle Array type in Python Object API. Updated the
generated code accordingly.

* Fix the old style casting from int to char

* Fixed another conversion from int to char

* Fixed the import for typing

Importing typing may cause errors when a machine do not have the
moduel typing installed. This PR fixes the issue by guarding
"import typing" with the "try/except" statement.

* Fix issue of iterating the vector of import list

* Update the generated examples using generate_code.sh

* Fix the import order for typing

The import list was stored in unordered_set, so that each generated
codes may have different import order. Therefore, it failed in the
consistency test where two generated copies need to have exactly the
same apperance.

* Optimize unpack using numpy

Use numpy to unpack vector whenever it is possible to improve unpack
performance.

Also, added codegen command for Python specificly in generate_code.sh,
because --no-includes cannot be turn on for Python.

* Fix the import order

* Update generate_code.bat for windows accordingly

* Replace error message with pass

Avoid printing error message for every Python2 users about typing.
Replace it with pass.
---
 tests/MyGame/Example/Any.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'tests/MyGame/Example/Any.py')

diff --git a/tests/MyGame/Example/Any.py b/tests/MyGame/Example/Any.py
index f1b8d519..b10d35df 100644
--- a/tests/MyGame/Example/Any.py
+++ b/tests/MyGame/Example/Any.py
@@ -8,3 +8,18 @@ class Any(object):
     TestSimpleTableWithEnum = 2
     MyGame_Example2_Monster = 3
 
+
+def AnyCreator(unionType, table):
+    from flatbuffers.table import Table
+    if not isinstance(table, Table):
+        return None
+    if unionType == Any().Monster:
+        import MyGame.Example.Monster
+        return MyGame.Example.Monster.MonsterT.InitFromBuf(table.Bytes, table.Pos)
+    if unionType == Any().TestSimpleTableWithEnum:
+        import MyGame.Example.TestSimpleTableWithEnum
+        return MyGame.Example.TestSimpleTableWithEnum.TestSimpleTableWithEnumT.InitFromBuf(table.Bytes, table.Pos)
+    if unionType == Any().MyGame_Example2_Monster:
+        import MyGame.Example2.Monster
+        return MyGame.Example2.Monster.MonsterT.InitFromBuf(table.Bytes, table.Pos)
+    return None
-- 
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