I want to generate a series for forward P/E ratio as: Price / Sum(next 4 quarters earnings).

I am using request.earnings() as follows (it is supposeed to deliver future earnings as well?):

ee = request.earnings(syminfo.tickerid, earnings.estimate, gaps=barmerge.gaps_off, lookahead=barmerge.lookahead_on)

My intention is to sum the 4 next eps, and then fPE = close / next_year_earnings ; but I am not sure how to do this. So far, I’ve only used series for historical data.

Thanks for your help.