Fix sys import in __init__

skopt/__init__.py

@@ -45,7 +45,6 @@ def f(x):
 
 Run the tests by executing `pytest` in the top level directory.
 """
-import sys
 try:
     # This variable is injected in the __builtins__ by the build
     # process. It is used to enable importing subpackages of sklearn when
@@ -73,8 +72,8 @@ def f(x):
 #
 __version__ = "0.7"
 
-
 if __SKOPT_SETUP__:
+    import sys
     sys.stderr.write('Partial import of skopt during the build process.\n')
     # We are not importing the rest of scikit-optimize during the build
     # process, as it may not be compiled yet