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authorDaniel Katz <katzdm@gmail.com>2020-10-16 10:12:51 -0400
committerDaniel Katz <katzdm@gmail.com>2020-10-27 19:00:22 -0400
commit01a512c7fc29add601a63fc228c48d28a544478d (patch)
tree481f0dad118077e2303ee6f659e0080359d5d0e6
parent10372270344689e5b77dd868f24be6615a1a8a28 (diff)
downloadpip-01a512c7fc29add601a63fc228c48d28a544478d.tar.gz
Fix linter error: Add missing function type declaration.
-rw-r--r--src/pip/_internal/utils/compatibility_tags.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/pip/_internal/utils/compatibility_tags.py b/src/pip/_internal/utils/compatibility_tags.py
index d5e6ab552..6780f9d9d 100644
--- a/src/pip/_internal/utils/compatibility_tags.py
+++ b/src/pip/_internal/utils/compatibility_tags.py
@@ -87,6 +87,10 @@ def _get_custom_platforms(arch):
def _expand_allowed_platforms(platforms):
+ # type: (Optional[List[str]]) -> Optional[List[str]]
+ if not platforms:
+ return None
+
seen = set()
result = []