Support for python 3.8.x ubuntu 20.04

[arkachat]

Hi ,

g++ -fPIC -std=c++0x -g -O2 -c -o src/AggregationResult.o -Iinclude -Isrc src/AggregationResult.cpp g++ -fPIC -std=c++0x -g -O2 -c -o src/Container.o -Iinclude -Isrc src/Container.cpp g++ -fPIC -std=c++0x -g -O2 -c -o src/Store.o -Iinclude -Isrc src/Store.cpp g++ -fPIC -std=c++0x -g -O2 -c -o src/StoreFactory.o -Iinclude -Isrc src/StoreFactory.cpp In file included from src/StoreFactory.cpp:17: src/StoreFactory.h:43:62: warning: converting to non-pointer type ‘int32_t’ {aka ‘int’} from NULL [-Wconversion-null] 43 | Store* get_store(const char* host=NULL, int32_t port=NULL, const char* cluster_name=NULL, | ^~~~ g++ -fPIC -std=c++0x -g -O2 -c -o src/PartitionController.o -Iinclude -Isrc src/PartitionController.cpp g++ -fPIC -std=c++0x -g -O2 -c -o src/Query.o -Iinclude -Isrc src/Query.cpp g++ -fPIC -std=c++0x -g -O2 -c -o src/Row.o -Iinclude -Isrc src/Row.cpp g++ -fPIC -std=c++0x -g -O2 -c -o src/QueryAnalysisEntry.o -Iinclude -Isrc src/QueryAnalysisEntry.cpp g++ -fPIC -std=c++0x -g -O2 -c -o src/RowKeyPredicate.o -Iinclude -Isrc src/RowKeyPredicate.cpp g++ -fPIC -std=c++0x -g -O2 -c -o src/RowSet.o -Iinclude -Isrc src/RowSet.cpp g++ -fPIC -std=c++0x -g -O2 -c -o src/TimestampUtils.o -Iinclude -Isrc src/TimestampUtils.cpp swig -DSWIGWORDSIZE64 -outdir . -o src/griddb_python.cxx -c++ -python src/griddb.i g++ -fPIC -std=c++0x -g -O2 -c -o src/griddb_python.o -Iinclude -Isrc -I/usr/include/python3.6 src/griddb_python.cxx src/griddb_python.cxx:181:11: fatal error: Python.h: No such file or directory 181 | # include <Python.h> | ^~~~~~~~~~ compilation terminated. make: *** [Makefile:47: src/griddb_python.o] Error 1