Add CI diagnostics

Author: topolarity

.github/workflows/system.yml

@@ -66,6 +66,10 @@ jobs:
         env:
           PYTHON: python
       - run: julia test/check_deps_version.jl ${{ matrix.python-version }}
+      - run: python -c "import numpy; print(numpy.__version__)"
+      - run: python -c "import numpy; print(numpy.__file__)"
+      - run: python -c "import sys; print(sys.path)"
+      - run: python -c "import os; import inspect; print(inspect.getfile(os))"
       - uses: julia-actions/julia-runtest@v1
         env:
           # Windows temp directories break the CI:

test/runtests.jl

@@ -11,8 +11,25 @@ PYTHONHOME=get(ENV,"PYTHONHOME","")
 PYTHONEXECUTABLE=get(ENV,"PYTHONEXECUTABLE","")
 @info "Python version $pyversion from $(PyCall.libpython), PYTHONHOME=$(PyCall.PYTHONHOME)\nENV[PYTHONPATH]=$PYTHONPATH\nENV[PYTHONHOME]=$PYTHONHOME\nENV[PYTHONEXECUTABLE]=$PYTHONEXECUTABLE"
 
+os = pyimport("os")
+sys = pyimport("sys")
+pushfirst!(sys."path", "")
+
 @testset "CI setup" begin
     if lowercase(get(ENV, "CI", "false")) == "true"
+        # Diagnose the actual error if numpy fails to import
+        py"""
+import sys, struct
+print(f"Python arch (pointer size): {struct.calcsize('P') * 8}-bit", file=sys.stderr)
+print(f"Python platform: {sys.platform}", file=sys.stderr)
+try:
+    import numpy
+    print(f"numpy loaded from {numpy.__file__}", file=sys.stderr)
+except Exception as e:
+    print(f"Failed to import numpy: {e}", file=sys.stderr)
+    import traceback
+    traceback.print_exc(file=sys.stderr)
+"""
         @test !ispynull(pyimport_e("numpy"))
     end
 end