Standardize on os.environ.get under cuda_pathfinder/

Author: rwgk

cuda_pathfinder/cuda/pathfinder/_dynamic_libs/find_nvidia_dynamic_lib.py

@@ -113,7 +113,7 @@ def _find_lib_dir_using_cuda_home(libname: str) -> Optional[str]:
 
 
 def _find_lib_dir_using_conda_prefix(libname: str) -> Optional[str]:
-    conda_prefix = os.getenv("CONDA_PREFIX")
+    conda_prefix = os.environ.get("CONDA_PREFIX")
     if not conda_prefix:
         return None
     return _find_lib_dir_using_anchor_point(

cuda_pathfinder/cuda/pathfinder/_headers/find_nvidia_headers.py

@@ -90,7 +90,7 @@ def _find_ctk_header_directory(libname: str) -> Optional[str]:
             if _joined_isfile(hdr_dir, h_basename):
                 return hdr_dir
 
-    conda_prefix = os.getenv("CONDA_PREFIX")
+    conda_prefix = os.environ.get("CONDA_PREFIX")
     if conda_prefix:  # noqa: SIM102
         if result := _find_based_on_conda_layout(libname, h_basename, conda_prefix):
             return result

cuda_pathfinder/tests/test_find_nvidia_headers.py

@@ -59,7 +59,7 @@ def test_find_libname_nvshmem(info_summary_append):
         if have_nvidia_nvshmem_package():
             hdr_dir_parts = hdr_dir.split(os.path.sep)
             assert "site-packages" in hdr_dir_parts
-        elif conda_prefix := os.getenv("CONDA_PREFIX"):
+        elif conda_prefix := os.environ.get("CONDA_PREFIX"):
             assert hdr_dir.startswith(conda_prefix)
         else:
             assert hdr_dir.startswith("/usr/include/nvshmem_")