заменить Нэн в пандах
df['DataFrame Column'] = df['DataFrame Column'].fillna(0)
Dark Duck
df['DataFrame Column'] = df['DataFrame Column'].fillna(0)
df.fillna(0)df.Temp_Rating.fillna(df.Farheit, inplace=True)
del df['Farheit']
df.columns = 'File heat Observations'.split()