Python 3.9

.github/workflows/ci.yml

@@ -347,7 +347,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ['3.7', '3.8']
+        python: ['3.7', '3.8', '3.9']
 
     steps:
     - name: Setup Python

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fixed the docstring information for the `FBetaMultiLabelMeasure` metric.
+- Various fixes for Python 3.9
 
 ## [v2.8.0](https://github.com/allenai/allennlp/releases/tag/v2.8.0) - 2021-11-01
 

allennlp/common/file_utils.py

@@ -171,9 +171,7 @@ def __new__(cls, filename: Union[str, PathLike], *, read_only: bool = False, **k
         except FileNotFoundError:
             result = None
         if result is None:
-            result = super(TensorCache, cls).__new__(
-                cls, filename, read_only=read_only, **kwargs
-            )  # type: ignore
+            result = super(TensorCache, cls).__new__(cls)
         return result
 
     def __init__(