Luck of libraries and initial userbase are certainly involved in success, but not all scripting languages are equal. I mean we could add bash to that list then.

Luck of libraries and initial userbase are certainly involved in success, but not all scripting languages are equal. I mean we could add bash to that list then. In fact I'd argue that python enjoying the success it has, despite probably the worst handling of a version bump in any language (2->3), is a testament to its popularity.