# extract value from `n`th row, `m`th column
df.iat[n,m]
# extract value from last row, 4th column
df.iat[-1,3]
# extract value from last row, last column
df.iat[-1,-1]
note:df is your dataframe of pandas that has your data
your_coloum_name = df['your_coloum_name'].values