Flatbuffer python generation failed when nested flatbuffers are used within a child namespace

[hotwinter]

Define the following files

namespace test_nested.nested;

file_identifier "TESB";

table B {
  data1:[ubyte];
}

root_type B;

include "B.fbs";
namespace test_nested;

file_identifier "TESA";

table A {
  data2:[ubyte] (force_align: 64, nested_flatbuffer:"nested.B");
}

root_type A;

and generate the python code using flatc --python A.fbs

try including the generated file in a python file errors out when executing

from test_nested import A as a_fbs

Traceback (most recent call last):
    from test_nested.nested.B import nested.B
                                           ^
SyntaxError: invalid syntax

The solution is to change the line in

flatbuffers/src/idl_gen_python.cpp

Line 1115 in 1c51462

const std::string unqualified_name = nested->constant;

to

const std::string unqualified_name = namer_.Type(struct_def);

in order to get the correct naming for import