Bump mypy from 0.770 to 0.780 (#4316)

* Bump mypy from 0.770 to 0.780

Bumps [mypy](https://github.com/python/mypy) from 0.770 to 0.780.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.770...v0.780)

Signed-off-by: dependabot-preview[bot] <[email protected]>

* mypy upgrade work-arounds

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: epwalsh <[email protected]>

Author: dependabot-preview[bot]

allennlp/common/file_utils.py

@@ -321,7 +321,7 @@ def get_from_cache(url: str, cache_dir: str = None) -> str:
 
                 logger.info("copying %s to cache at %s", temp_file.name, cache_path)
                 with open(cache_path, "wb") as cache_file:
-                    shutil.copyfileobj(temp_file, cache_file)
+                    shutil.copyfileobj(temp_file, cache_file)  # type: ignore
 
                 logger.info("creating metadata file for %s", cache_path)
                 meta = {"url": url, "etag": etag}

allennlp/modules/token_embedders/embedding.py

@@ -5,7 +5,7 @@
 import tarfile
 import warnings
 import zipfile
-from typing import Any, cast, IO, Iterator, NamedTuple, Optional, Sequence, Tuple
+from typing import Any, cast, Iterator, NamedTuple, Optional, Sequence, Tuple, BinaryIO
 
 import numpy
 import torch
@@ -590,7 +590,7 @@ def _open_inside_zip(self, archive_path: str, member_path: Optional[str] = None)
             members_list = archive.namelist()
             member_path = self._get_the_only_file_in_the_archive(members_list, archive_path)
         member_path = cast(str, member_path)
-        member_file = archive.open(member_path, "r")
+        member_file = cast(BinaryIO, archive.open(member_path, "r"))
         self._handle = io.TextIOWrapper(member_file, encoding=self._encoding)
         self._archive_handle = archive
 
@@ -602,7 +602,7 @@ def _open_inside_tar(self, archive_path: str, member_path: Optional[str] = None)
             member_path = self._get_the_only_file_in_the_archive(members_list, archive_path)
         member_path = cast(str, member_path)
         member = archive.getmember(member_path)  # raises exception if not present
-        member_file = cast(IO[bytes], archive.extractfile(member))
+        member_file = cast(BinaryIO, archive.extractfile(member))
         self._handle = io.TextIOWrapper(member_file, encoding=self._encoding)
         self._archive_handle = archive
 

dev-requirements.txt

@@ -4,7 +4,7 @@
 flake8
 
 # Static type checking
-mypy==0.770
+mypy==0.780
 
 # Automatic code formatting
 black