for MIB modules loading, invoke __import__() like

>>> from pysnmp.smi.mibs import __init__
which seems to be more in-line with __import__()

2 files changed, 2 insertions, 3 deletions

diff --git a/CHANGES b/CHANGES
index 7a9c885..3f57f5b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -104,6 +104,7 @@ Revision 4.2.3
   MibInstrumController.__indexMib()
 - Dedicated 'withmib' example set is obsolete and removed.
 - Another SNMP proxy example app added (1to3.py).
+- Fix to MIB modules loading code to make it using __import__() properly.
 - Typo fix to snmpInASNParseErrs MIB instance object.
 - Typo fix to errind.EngineIdMismatch class and its instance.
 
diff --git a/pysnmp/smi/builder.py b/pysnmp/smi/builder.py
index e7cf02f..c56b7aa 100644
--- a/pysnmp/smi/builder.py
+++ b/pysnmp/smi/builder.py
@@ -94,9 +94,7 @@ class __AbstractMibSource:
 class ZipMibSource(__AbstractMibSource):
     def _init(self):
         try:
-            p = __import__(
-                self._srcName, globals(), locals(), self._srcName.split('.')
-                )
+            p = __import__(self._srcName, globals(), locals(), ['__init__'])
             if hasattr(p, '__loader__'):
                 self.__loader = p.__loader__
                 self._srcName = self._srcName.replace('.', os.sep)