[fix] errors on python compatibility

- f-string doesn't allow back-slash before python 3.11
- cyclic import before python 3.13

Author: LoSealL

.github/workflows/mppq_unittest.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: [ubuntu-latest]
     strategy:
       matrix:
-        python-version: ["3.12"]
+        python-version: ["3.11", "3.12"]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}

mppq/__init__.py

@@ -7,7 +7,7 @@
 Minimized PPQ quantizer package.
 """
 
-from mppq import api
+from . import api
 
 __all__ = ["api"]
-__version__ = "0.7.3"
+__version__ = "0.7.4"

mppq/frontend/onnx/onnx_parser.py

@@ -208,8 +208,9 @@ def build(
     ) -> BaseGraph:
         """Build PPQ IR graph from an onnx file."""
         if kw:
+            keys = "\n  ".join(kw.keys())
             self._log.warning("Extra argument is not accepted! Ignoring:")
-            self._log.warning(f'\n  {"\n  ".join(kw.keys())}')
+            self._log.warning(f"\n  {keys}")
         if isinstance(model_object, onnx.ModelProto):
             model_pb = model_object
         elif not Path(model_object).exists():