Python of +50 is a bit misleading. Just made a setup for my buddy, it's 185 M in top A configuration as an armed trader.
http://www.edshipyard.com/#/L=705,4...,30B69Y7_6QB69Y8I,7Ue0AA0AA50U08c07205U05U03w
Thats not an armed trader. That is a waste of money. There is no reason to have a 7A PP, 6A thrusters, beam lasers, A rated sensors, Class 6 shields or reinforced armor for a trade ship. The 5A fuel scoop is also wasteful - how long is your trade route? Not to mention that with all that overpriced junk you equipped, you are giving up almost 100 Tons of cargo space.
You can get a trade anaconda for the same 180 Million and make triple the profit as with that Python build of yours.