isna -> isnull

Author: ShichenXie

scorecardpy/condition_fun.py

@@ -92,7 +92,7 @@ def check_y(dat, y, positive):
  raise Exception("Incorrect inputs; there is no \'{}\' column in dat.".format(y))
 
  # remove na in y
- if pd.isna(dat[y]).any():
+ if dat[y].isnull().any():
  warnings.warn("There are NaNs in \'{}\' column. The rows with NaN in \'{}\' were removed from dat.".format(y,y))
  dat = dat.dropna(subset=[y])
  # dat = dat[pd.notna(dat[y])]