add: comments for walkarounds, small fixes

Author: Griger5

src/PyPartMC/__init__.py

@@ -10,6 +10,8 @@
 from contextlib import contextmanager
 from pathlib import Path
 
+import nanobind
+
 
 # https://github.com/diegoferigo/cmake-build-extension/blob/master/src/cmake_build_extension/__init__.py
 @contextmanager
@@ -76,7 +78,5 @@ def __generate_si():
 
 __version__ = importlib.metadata.version(__package__)
 
-import nanobind
-
-meta_cls = type(_PyPartMC.AeroData)
-setattr(nanobind, "nb_type_0", meta_cls)
+# walkaround for MATLAB bindings
+setattr(nanobind, "nb_type_0", type(_PyPartMC.AeroData))

src/pypartmc.cpp

@@ -12,7 +12,7 @@
 #include "nanobind/stl/tuple.h"
 #include "nanobind/stl/detail/nb_optional.h"
 #include "nanobind/ndarray.h"
-#undef snprintf
+#undef snprintf // required to fix an issue with std::snprintf in nlohmann::json
 #include "nlohmann/json.hpp"
 #include "nanobind_json/nanobind_json.hpp"
 #include "sundials/sundials_config.h"