lint.

Author: trivialfis

python-package/xgboost/core.py

@@ -209,7 +209,7 @@ def ctypes2numpy(cptr, length, dtype):
 
 def ctypes2cupy(cptr, length, dtype):
     """Convert a ctypes pointer array to a cupy array."""
-    import cupy
+    import cupy                 # pylint: disable=import-error
     mem = cupy.zeros(length.value, dtype=dtype, order='C')
     addr = ctypes.cast(cptr, ctypes.c_void_p).value
     # pylint: disable=c-extension-no-member,no-member