Adding type annotations to pip._internal.utils.glibc (#5956)

* Added type annotations * to satsify flake8 E402 * Update src/pip/_internal/utils/glibc.py Co-Authored-By: atse <atse@users.noreply.github.com>
pypa · Nov 6, 2018 · aa42f14 · aa42f14
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commit aa42f14
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diff --git a/news/75FB6292-DB3F-4DF2-AADE-7DE25A678686.trivial b/news/75FB6292-DB3F-4DF2-AADE-7DE25A678686.trivial
diff --git a/src/pip/_internal/utils/glibc.py b/src/pip/_internal/utils/glibc.py
@@ -56,7 +56,7 @@ def check_glibc_version(version_str, required_major, minimum_minor):
 
 def have_compatible_glibc(required_major, minimum_minor):
     # type: (int, int) -> bool
-    version_str = glibc_version_string()
+    version_str = glibc_version_string()  # type: Optional[str]
     if version_str is None:
         return False
     return check_glibc_version(version_str, required_major, minimum_minor)