better setuptools 74.0 fix

pygenn/genn_model.py

@@ -31,7 +31,6 @@
 from os import path, environ
 from platform import system
 from psutil import cpu_count
-from setuptools import msvc
 from shutil import which
 from subprocess import check_call  # to call make
 from textwrap import dedent
@@ -70,9 +69,17 @@
 
 # If we're on windows
 if system() == "Windows":
+    # Try import the helper to get Visual C++ environment from setuptools
+    # **NOTE** this was removed in version 74.0
+    try:
+        from setuptools.msvc import msvc14_get_vc_env as _get_vc_env
+    # If this fails, import from distutils
+    except ImportError:
+        from distutils._msvccompiler import _get_vc_env
+
     # Get environment and cache in class, convertings
     # all keys to upper-case for consistency
-    _msvc_env = msvc.msvc14_get_vc_env("x86_amd64")
+    _msvc_env = _get_vc_env("x86_amd64")
     _msvc_env = {k.upper(): v for k, v in _msvc_env.items()}
 
     # Update process's environment with this