To teach you to use the C # extension method in IronPython

In the current development process, we often use extension methods to reduce the amount of code in a single file and reduce the chance of exclusive locking of files in collaborative development. Extension methods enable you to add a method to an existing type without creating a new derived type, recompiling, or otherwise modifying the original type. An extension method is a special static method, but can be invoked just like an instance method on an extended type.

With the extensive use of the DLR, there is a growing need for C # code and scripting language interaction. (If you know how to use it, suggest going to the official website of DLR) However, for extended methods, if used directly, the DLR cannot find the specified method.