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data['last_price'] = data['last_price'].astype('int')
data['first_day_exposition'] = pd.to_datetime(data['first_day_exposition'], format = '%Y-%m-%d')
data['floors_total'] = data['floors_total'].astype('int')
data['is_apartment'] = data['is_apartment'].fillna(False)
data['balcony'] = data['balcony'].fillna(value=0).astype('int')
data['parks_around3000'] = data['parks_around3000'].fillna(value=0).astype('int')
data['ponds_around3000'] = data['ponds_around3000'].fillna(value=0).astype('int')
data['days_exposition'] = data['days_exposition'].fillna(0).astype('int')

display(data.isnull().sum())