Fix flux.cpp py import so it works on Windows

Also fix test_geometries so it passes on Windows

Author: mwiesenberger

.gitignore

@@ -9,3 +9,12 @@ pyfeltor/dg/geo/__pycache__
 .eggs
 dist
 pyfeltor/_version.py
+
+uv.lock
+
+# ignore visual studio .vs table
+/.vs
+
+# CMake output
+build
+out

pyfeltor/dg/geo/flux.cpp

@@ -10,8 +10,6 @@
 
 namespace py = pybind11;
 
-// import part of itself!? Does this always work?? Wow
-py::object grid = py::module_::import( "pyfeltor.dg").attr("Grid");
 
 PYBIND11_MODULE(flux, m) {
     m.def( "createSolovevField", &dg::geo::createSolovevField);

tests/test_geometries.py

@@ -86,8 +86,8 @@ def test_sheath(datadir):
 
     point,RO,ZO = dg.geo.findOpoint( mag.get_psip(), R0, 0)
     assert( point == 1)
-    assert( RO == 0.9022324795511738)
-    assert( ZO == -0.005684720497897021)
+    assert( abs(RO - 0.9022324795511738) < 1e-10)
+    assert( abs(ZO - (-0.005684720497897021)) < 1e-10)
 
     closed = dg.geo.mod.ClosedFieldlineRegion( mag);
     assert( closed( 0, R0))