Rewrite globs as chain of iterables.

dde1bfbf · Jason R. Coombs · 8f0ac47d · dde1bfbf
Commit dde1bfbf authored May 22, 2016 by Jason R. Coombs
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setuptools/command/build_py.py setuptools/command/build_py.py +3 -3

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--- a/setuptools/command/build_py.py
+++ b/setuptools/command/build_py.py
@@ -194,9 +194,9 @@ class build_py(orig.build_py, Mixin2to3):

    def exclude_data_files(self, package, src_dir, files):
        """Filter filenames for package's data files in 'src_dir'"""
-        globs = (
-            self.exclude_package_data.get('', [])
-            + self.exclude_package_data.get(package, [])
+        globs = itertools.chain(
+            self.exclude_package_data.get('', []),
+            self.exclude_package_data.get(package, []),
        )
        bad = set(
            item