Importing the necessary libraries and loading the data:
import pandas as pd
df = pd.read_csv('C:\Data\sample_data\california_housing_test.csv')

df

df.loc[3000] = pd.Series({'longitude':-200,
'latitude':'-200',
'housing_median_age':'-200',
'total_rooms':'-200',
'total_bedrooms':'-200',
'population':'-200',
'SnowflakeLoopBatchSize':'-200',
'households':'-200',
'median_income':'-200',
'median_house_value':'-200'})

df.loc[3001] = pd.Series({'longitude':-300,
'latitude':'-300',
'housing_median_age':'-300',
'total_rooms':'-300',
'total_bedrooms':'-300',
'population':'-300',
'SnowflakeLoopBatchSize':'-300',
'households':'-300',
'median_income':'-300',
'median_house_value':'-300'})