Move the module defining the GUID symbol under the _post_coinit s…

…ubpackage. (#653)

* `git mv comtypes/GUID.py comtypes/_post_coinit/guid.py`

* Modify the import sections
to reflect the definition changes.

* Avoid runtime errors caused by undefined references
by changing the type annotation to a string literal.

comtypes/__init__.py

@@ -35,7 +35,6 @@
 else:
     _CData = _SimpleCData.__mro__[:-1][-1]
 
-from comtypes.GUID import GUID
 from comtypes import patcher  # noqa
 from comtypes._npsupport import interop as npsupport  # noqa
 from comtypes._tlib_version_checker import _check_version  # noqa
@@ -73,8 +72,6 @@ class ReturnHRESULT(Exception):
 # class IDLWarning(UserWarning):
 #    "Warn about questionable type information"
 
-_GUID = GUID
-IID = GUID
 DWORD = c_ulong
 
 wireHWND = c_ulong
@@ -182,7 +179,10 @@ def CoUninitialize():
 ################################################################
 
 from comtypes._post_coinit.bstr import BSTR  # noqa
+from comtypes._post_coinit.guid import GUID
 
+_GUID = GUID
+IID = GUID
 
 ################################################################
 # IPersist is a trivial interface, which allows to ask an object about

comtypes/_memberspec.py

@@ -360,7 +360,7 @@ def to_propputref_keys(self, m: _DispMemberSpec) -> Tuple[str, _DocType, int]:
 
 
 class ComMemberGenerator(object):
-    def __init__(self, cls_name: str, vtbl_offset: int, iid: comtypes.GUID) -> None:
+    def __init__(self, cls_name: str, vtbl_offset: int, iid: "comtypes.GUID") -> None:
         self._vtbl_offset = vtbl_offset
         self._iid = iid
         self._props = ComPropertyGenerator(cls_name)

comtypes/_post_coinit/misc.py

@@ -15,11 +15,11 @@
 if TYPE_CHECKING:
     from comtypes import hints as hints  # noqa  # type: ignore
 
-from comtypes import GUID
 from comtypes._idl_stuff import COMMETHOD  # noqa
 from comtypes import CLSCTX_SERVER, CLSCTX_LOCAL_SERVER, CLSCTX_REMOTE_SERVER
 from comtypes import _ole32, oledll, DWORD
 from comtypes._post_coinit.unknwn import IUnknown
+from comtypes._post_coinit.guid import GUID
 
 
 def _is_object(obj):

comtypes/_post_coinit/unknwn.py

@@ -7,11 +7,12 @@
 from typing import Optional
 from typing import List, Type
 
-from comtypes import GUID, _ole32_nohresult, com_interface_registry
+from comtypes import _ole32_nohresult, com_interface_registry
 from comtypes._idl_stuff import STDMETHOD
 from comtypes._memberspec import ComMemberGenerator, DispMemberGenerator
 from comtypes._memberspec import _ComMemberSpec, _DispMemberSpec
 from comtypes._post_coinit import _cominterface_meta_patcher as _meta_patch
+from comtypes._post_coinit.guid import GUID
 from comtypes._py_instance_method import instancemethod
 
 logger = logging.getLogger(__name__)