Change start of weekday from monday to sunday in datetimeindex in python
I got a breakthrough, yes.
From my previous code, I redefined W-SAT instead of the default W.
Previous code:
weekreq = daysreq.resample('W').apply({'Numbers':'sum'})
to 
New code: 
weekreq = daysreq.resample('W-SAT').apply({'Numbers':'sum'})
The default start of the weekday is Monday (0) in Pandas. Am trying to make this as Sunday instead on datetimeindex for getting weekly counts ending on Saturday to forecast a timeseries model.