I am trying to write:

df4_Rem_Time = 390 – df4[‘Time_IDX’]
df4[‘Cum_Forwd’] = df4[‘Cum_Time’].shift(-df4_Rem_Time)

Here, if I use a number directly like 50 in lieu of df4_Rem_Time, it works, but in the current format, I get errors in the shift parameter, df4_Rem_Time. I am stuck. Is this due to mishandling primitive or nonprimitive data structure? For example, df4_Rem_Time is the result of int format in 390 and float in df4[‘Time_IDX’].

Could anyone help?

I tried to use int function and no avail.