Use nrn8.2.7; fix some 3.13 issues

Author: pgleeson

omv/engines/getnrn.py

@@ -10,7 +10,7 @@
 def install_neuron(version):
     if not version:
         if sys.version_info.major == 3:
-            version = "8.2.6"  # for pynn 0.11.0
+            version = "8.2.7"  # for pynn 0.11.0
         else:
             version = "7.6"
 

omv/engines/neuron_.py

@@ -85,6 +85,7 @@ def is_installed():
             inform("Checking whether %s is installed..." % NeuronEngine.name, indent=1)
         try:
             output = check_output(["nrniv", "--version"], verbosity=2)
+            output = output[output.index('NEURON'):]
             if is_verbose():
                 inform(
                     "%s is installed; env: %s"

omv/omv_util.py

@@ -154,8 +154,8 @@ def main():
             ]:
                 installed_ver = False
                 try:
-                    exec("import %s" % m)
-                    installed_ver = "v%s" % eval("%s.__version__" % m)
+                    mod = __import__(m)
+                    installed_ver = "v%s" % getattr(mod, "__version__", "unknown")
                 except Exception:
                     pass
                 inform(