Error: Locale not supported by C library

I'm using Eclipse and whenever I run the following import: "import graph_tool.draw
as gt_draw" I get the following error in the console:

"(process:4178): Gtk-WARNING **: Locale not supported by C library.

Using the fallback 'C' locale."

What's wrong please?

attachment.html (681 Bytes)

This is not an error, it is just a warning. You may choose to ignore it.

This has nothing to do with graph-tool; it just means that your system's
locale is not properly configured.