修复了大量存在的问题，增加了假鸭子类型等等机制

Test/TestProject3/temp/f8a7f964e23490fb.pyi

@@ -0,0 +1,14 @@
+"""
+Auto-generated Python stub file from mpooltest.py
+Module: mpooltest
+"""
+
+
+import t, c
+from t import CInt, CPtr, CChar
+import viperlib
+import viperio
+import stdlib
+import mpool
+
+def mpool_main() -> CInt: pass