Merge pull request #6535 from Carreau/kspec-exists

Kernelspec handle case where folder already exists

IPython/kernel/kernelspecapp.py

@@ -119,6 +119,9 class InstallNativeKernelSpec(BaseIPythonApplication):
             if e.errno == errno.EACCES:
                 print("Permission denied")
                 self.exit(1)
+            if e.errno == errno.EEXIST:
+                print("File or folder already exists")
+                self.exit(1)
             raise
 
 class KernelSpecApp(Application):