Add support ratio in the fpgrowth's return rules

[pkuimyy]

Your project really help me. But could you please add support ratio in the fpgrowth function's return rules?

[chonyy]

Hi, I'm glad that my project could help you.

You can easily get the support of the rules from

fpgrowth_py/fpgrowth_py/utils.py

Line 137 in 2457a53

def associationRule(freqItemSet, itemSetList, minConf):

Feel free to clone the repo and modify it, return whatever you want!
Also, you might want to read this medium post where I walk through most of the code to help you understand it.

BR,
Chonyy