Move import to top

setuptools/command/build_py.py

@@ -6,6 +6,7 @@ import sys
 import fnmatch
 import textwrap
 import io
+import distutils.errors
 
 
 try:
@@ -162,9 +163,7 @@ class build_py(orig.build_py, Mixin2to3):
         with io.open(init_py, 'rb') as f:
             contents = f.read()
         if b'declare_namespace' not in f.read():
-            from distutils.errors import DistutilsError
-
-            raise DistutilsError(
+            raise distutils.errors.DistutilsError(
                 "Namespace package problem: %s is a namespace package, but "
                 "its\n__init__.py does not call declare_namespace()! Please "
                 'fix it.\n(See the setuptools manual under '