diff --git a/cfg/python.cfg b/cfg/python.cfg
index 5b0b05e88..dda1c1481 100644
--- a/cfg/python.cfg
+++ b/cfg/python.cfg
@@ -36,6 +36,18 @@
     <noreturn>false</noreturn>
     <pure/>
     <returnValue type="void"/>
+    <use-retval/>
+  </function>
+  <function name="Py_Main">
+    <leak-ignore/>
+    <returnValue type="int"/>
+    <arg nr="1">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+    <arg nr="2">
+      <not-uninit/>
+    </arg>
   </function>
   <function name="Py_SetProgramName,Py_SetPythonHome">
     <leak-ignore/>
@@ -46,14 +58,31 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- void PyErr_SetString(PyObject *type, const char *message) -->
+  <function name="PyErr_SetString">
+    <leak-ignore/>
+    <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1">
+      <strz/>
+      <not-uninit/>
+    </arg>
+    <arg nr="2">
+      <strz/>
+      <not-null/>
+      <not-uninit/>
+    </arg>
+  </function>
   <function name="Py_GetProgramName,Py_GetExecPrefix,Py_GetProgramFullPath,Py_GetPath,Py_GetPythonHome">
     <noreturn>false</noreturn>
     <returnValue type="char *"/>
     <pure/>
+    <use-retval/>
   </function>
   <function name="Py_GetVersion,Py_GetPlatform,Py_GetCopyright,Py_GetCompiler,Py_GetBuildInfo">
     <noreturn>false</noreturn>
     <returnValue type="const char *"/>
     <pure/>
+    <use-retval/>
   </function>
 </def>