Create a function for only_strs to help document its purpose.

1 files changed, 8 insertions, 3 deletions

diff --git a/setuptools/command/easy_install.py b/setuptools/command/easy_install.py
index bdacbbfc..ef1a9b23 100644
--- a/setuptools/command/easy_install.py
+++ b/setuptools/command/easy_install.py
@@ -1334,9 +1334,7 @@ class easy_install(Command):
         if not self.user:
             return
         home = convert_path(os.path.expanduser("~"))
-        for path in self.config_vars.values():
-            if not isinstance(path, str):
-                continue
+        for path in only_strs(self.config_vars.values()):
             if path.startswith(home) and not os.path.isdir(path):
                 self.debug_print("os.makedirs('%s', 0o700)" % path)
                 os.makedirs(path, 0o700)
@@ -2306,6 +2304,13 @@ def current_umask():
     return tmp
 
 
+def only_strs(values):
+    """
+    Exclude non-str values. Ref #3063.
+    """
+    return filter(lambda val: isinstance(val, str), values)
+
+
 class EasyInstallDeprecationWarning(SetuptoolsDeprecationWarning):
     """
     Warning for EasyInstall deprecations, bypassing suppression.