修复了大量存在的问题，增加了假鸭子类型等等机制

Test/IterTest/temp/1452048cbd90ae2f.pyi

@@ -0,0 +1,23 @@
+"""
+Auto-generated Python stub file from main.py
+Module: main
+"""
+
+import c
+
+
+import t
+import stdio
+import string
+import testcheck
+
+def test_for_in_string() -> t.CInt: pass
+
+def test_for_in_char_ptr() -> t.CInt: pass
+
+def test_strcpy_for_in() -> t.CInt: pass
+
+
+import w32.win32memory
+
+def main() -> t.CInt: pass