Added a workaround for #139.

pysnmp/smi/builder.py

@@ -10,6 +10,7 @@
 import sys
 import time
 import traceback
+from typing import Any
 import warnings
 from errno import ENOENT
 from importlib.machinery import BYTECODE_SUFFIXES, SOURCE_SUFFIXES
@@ -447,7 +448,7 @@ def unload_modules(self, *modNames):
 
         return self
 
-    def import_symbols(self, modName, *symNames, **userCtx):
+    def import_symbols(self, modName, *symNames, **userCtx) -> "tuple[Any, ...]":
         """Import MIB symbols."""
         if not modName:
             raise error.SmiError("importSymbols: empty MIB module name")

pysnmp/smi/mibs/SNMPv2-TC.py

@@ -293,7 +293,7 @@ def prettyIn(self, value):  # override asn1 type method
 
         if self.displayHint and (
             self.__integer.isSuperTypeOf(self, matchConstraints=False)
-            and self.getNamedValues()
+            and not self.getNamedValues()
             or self.__unsigned32.isSuperTypeOf(self, matchConstraints=False)
             or self.__timeticks.isSuperTypeOf(self, matchConstraints=False)
         ):

pysnmp/smi/rfc1902.py

@@ -1052,9 +1052,11 @@ class instance representing MIB browsing functionality.
             return self
 
         try:
+            old_value = self.__args[1]._value
             self.__args[1] = (
                 object_identity.get_mib_node().getSyntax().clone(self.__args[1])
             )
+            self.__args[1]._value = old_value  # force to keep the original value
         except PyAsn1Error:
             err = "MIB object %r having type %r failed to cast value " "%r: %s" % (
                 object_identity.prettyPrint(),

tests/agent_context.py

@@ -156,13 +156,11 @@ def get_fixed_date_and_time():
             MibScalar((1, 3, 6, 1, 4, 1, 60069, 9, 7), v2c.Integer32()).setMaxAccess(
                 "read-write"
             ),
-            MibScalarInstance((1, 3, 6, 1, 4, 1, 60069, 9, 7), (0,), v2c.Integer32(50)),
+            MibScalarInstance((1, 3, 6, 1, 4, 1, 60069, 9, 7), (0,), v2c.Integer32(5)),
             MibScalar((1, 3, 6, 1, 4, 1, 60069, 9, 8), v2c.Unsigned32()).setMaxAccess(
                 "read-write"
             ),
-            MibScalarInstance(
-                (1, 3, 6, 1, 4, 1, 60069, 9, 8), (0,), v2c.Unsigned32(50)
-            ),
+            MibScalarInstance((1, 3, 6, 1, 4, 1, 60069, 9, 8), (0,), v2c.Unsigned32(5)),
         )
 
         # --- end of Managed Object Instance initialization ----

tests/hlapi/v1arch/asyncio/manager/cmdgen/test_v1arch_v1_get.py

@@ -233,7 +233,7 @@ async def test_v1_get_scaled_integer_object():
         assert len(varBinds) == 1
         assert varBinds[0][0].prettyPrint() == "LEXTUDIO-TEST-MIB::testScaledInteger.0"
         assert (
-            varBinds[0][1].prettyPrint() == "5.0"
+            varBinds[0][1].prettyPrint() == "0.5"
         )  # IMPORTANT: test display hint "d-1".
 
 
@@ -267,5 +267,5 @@ async def test_v1_get_scaled_unsigned_object():
         assert len(varBinds) == 1
         assert varBinds[0][0].prettyPrint() == "LEXTUDIO-TEST-MIB::testScaledUnsigned.0"
         assert (
-            varBinds[0][1].prettyPrint() == "50"  # GitHub issue #139
+            varBinds[0][1].prettyPrint() == "0.5"  # GitHub issue #139
         )  # IMPORTANT: test display hint "d-1".

tests/smi/manager/test_configure-mib-viewer-and-resolve-pdu-varbinds.py

@@ -98,3 +98,37 @@ def test_configure_mib_viewer_and_resolve_pdu_varbinds_full():
     for i, varBind in enumerate(varBinds):
         assert isinstance(varBind, rfc1902.ObjectType)
         assert varBind.prettyPrint() == expected_varbinds[i]
+
+
+def test_syntax_integer():
+    # Create MIB builder
+    mib_builder = builder.MibBuilder()
+
+    # Load MIB modules
+    compiler.addMibCompiler(mib_builder)
+    mib_builder.loadModules("LEXTUDIO-TEST-MIB")
+
+    # Get MIB object
+    (mib_object,) = mib_builder.import_symbols("LEXTUDIO-TEST-MIB", "testScaledInteger")
+
+    # Print MIB object syntax
+    assert (1, 3, 6, 1, 4, 1, 60069, 9, 7) == mib_object.getName()
+    assert "ScaledInteger" == mib_object.syntax.__class__.__name__
+
+
+def test_syntax_unsigned():
+    # Create MIB builder
+    mib_builder = builder.MibBuilder()
+
+    # Load MIB modules
+    compiler.addMibCompiler(mib_builder)
+    mib_builder.loadModules("LEXTUDIO-TEST-MIB")
+
+    # Get MIB object
+    (mib_object,) = mib_builder.import_symbols(
+        "LEXTUDIO-TEST-MIB", "testScaledUnsigned"
+    )
+
+    # Print MIB object syntax
+    assert (1, 3, 6, 1, 4, 1, 60069, 9, 8) == mib_object.getName()
+    assert "ScaledUnsigned" == mib_object.syntax.__class__.__name__