Why I can NOT use Python but PHP

[Lad]

I would like to set up my website and allow customers to choose
products there, including shopping carts. I would like to use Python
but it would be very complicated to start from nothing.
Why is there not any(?) framework or complete e-commerce solution
written in Python?
There are lots in PHP.One, very nice is http://www.oscommerce.org
Lad
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