Data Lifecycle: Storage.

# Reading from a CSV file.

# and writing the validated data out using pickle

import pickle

from weatherreading import WeatherReading

def valid$\_$temperature$($temperature : float$)$:

return $-40<$ temperature $<85$

def valid$\_$pressure$($pressure : float$)$:

return $300<$ pressure $<1200$

def valid$\_$humidity$($humidity : float$)$:

return $20<$ humidity $<80$