windev vs python SOS

[stéphane bard]

hello, my boss ask me to prefer windev to python.
I have to argue

  - python work on multiple platform (linux, mac, windows)
	A good point but it didn't interest him. Because
	we want to choose a language for prototyping.
	So multi platform is not enough.

  - python and windev are fast to develop

  - windev as a good IDE, python? boa-constructor is ok with wxpython

  - python is open source (that's not an argument for my boss, sorry 
it's 	a boss ...)

any idea for a strong argument ?