Files
flatbuffers/tests/namespace_test/NamespaceA/NamespaceB/TableInNestedNS.py
lu-wang-g 65f8703572 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.
2019-12-02 14:11:28 -08:00

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Python

# automatically generated by the FlatBuffers compiler, do not modify
# namespace: NamespaceB
import flatbuffers
from flatbuffers.compat import import_numpy
np = import_numpy()
class TableInNestedNS(object):
__slots__ = ['_tab']
@classmethod
def GetRootAsTableInNestedNS(cls, buf, offset):
n = flatbuffers.encode.Get(flatbuffers.packer.uoffset, buf, offset)
x = TableInNestedNS()
x.Init(buf, n + offset)
return x
# TableInNestedNS
def Init(self, buf, pos):
self._tab = flatbuffers.table.Table(buf, pos)
# TableInNestedNS
def Foo(self):
o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(4))
if o != 0:
return self._tab.Get(flatbuffers.number_types.Int32Flags, o + self._tab.Pos)
return 0
def TableInNestedNSStart(builder): builder.StartObject(1)
def TableInNestedNSAddFoo(builder, foo): builder.PrependInt32Slot(0, foo, 0)
def TableInNestedNSEnd(builder): return builder.EndObject()