update mypy to 0.730

.pre-commit-config.yaml

@@ -25,7 +25,7 @@ repos:
     files: \.py$
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v0.720
+  rev: v0.730
   hooks:
   - id: mypy
     exclude: docs|tests

src/pip/_internal/utils/appdirs.py

@@ -227,7 +227,8 @@ def _get_win_folder_with_ctypes(csidl_name):
     }[csidl_name]
 
     buf = ctypes.create_unicode_buffer(1024)
-    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
+    windll = ctypes.windll  # type: ignore
+    windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
 
     # Downgrade to short path name if have highbit chars. See
     # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
@@ -238,7 +239,7 @@ def _get_win_folder_with_ctypes(csidl_name):
             break
     if has_high_char:
         buf2 = ctypes.create_unicode_buffer(1024)
-        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
+        if windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
             buf = buf2
 
     # The type: ignore is explained under the type annotation for this function

src/pip/_internal/utils/filetypes.py

@@ -1,11 +1,16 @@
 """Filetype information.
 """
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Tuple
 
 WHEEL_EXTENSION = '.whl'
-BZ2_EXTENSIONS = ('.tar.bz2', '.tbz')
-XZ_EXTENSIONS = ('.tar.xz', '.txz', '.tlz', '.tar.lz', '.tar.lzma')
-ZIP_EXTENSIONS = ('.zip', WHEEL_EXTENSION)
-TAR_EXTENSIONS = ('.tar.gz', '.tgz', '.tar')
+BZ2_EXTENSIONS = ('.tar.bz2', '.tbz')  # type: Tuple[str, ...]
+XZ_EXTENSIONS = ('.tar.xz', '.txz', '.tlz',
+                 '.tar.lz', '.tar.lzma')  # type: Tuple[str, ...]
+ZIP_EXTENSIONS = ('.zip', WHEEL_EXTENSION)  # type: Tuple[str, ...]
+TAR_EXTENSIONS = ('.tar.gz', '.tgz', '.tar')  # type: Tuple[str, ...]
 ARCHIVE_EXTENSIONS = (
     ZIP_EXTENSIONS + BZ2_EXTENSIONS + TAR_EXTENSIONS + XZ_EXTENSIONS
 )

src/pip/_internal/wheel.py

@@ -55,7 +55,7 @@ from pip._internal.utils.urls import path_to_url
 if MYPY_CHECK_RUNNING:
     from typing import (
         Dict, List, Optional, Sequence, Mapping, Tuple, IO, Text, Any,
-        Iterable, Callable,
+        Iterable, Callable, Set,
     )
     from pip._vendor.packaging.requirements import Requirement
     from pip._internal.req.req_install import InstallRequirement
@@ -207,7 +207,7 @@ def message_about_scripts_not_on_PATH(scripts):
         return None
 
     # Group scripts by the path they were installed in
-    grouped_by_dir = collections.defaultdict(set)  # type: Dict[str, set]
+    grouped_by_dir = collections.defaultdict(set)  # type: Dict[str, Set[str]]
     for destfile in scripts:
         parent_dir = os.path.dirname(destfile)
         script_name = os.path.basename(destfile)
@@ -224,14 +224,14 @@ def message_about_scripts_not_on_PATH(scripts):
     warn_for = {
         parent_dir: scripts for parent_dir, scripts in grouped_by_dir.items()
         if os.path.normcase(parent_dir) not in not_warn_dirs
-    }
+    }  # type: Dict[str, Set[str]]
     if not warn_for:
         return None
 
     # Format a message
     msg_lines = []
-    for parent_dir, scripts in warn_for.items():
-        sorted_scripts = sorted(scripts)  # type: List[str]
+    for parent_dir, dir_scripts in warn_for.items():
+        sorted_scripts = sorted(dir_scripts)  # type: List[str]
         if len(sorted_scripts) == 1:
             start_text = "script {} is".format(sorted_scripts[0])
         else: