python store data in file
                                import pickle
file_name = 'data_stuff'
try:
    # this will create the file if it doesnt already exist
    history_data = open(file_name + ".dat", "x")
    history_data.close()
    history_data = []
    pickle.dump(history_data, open(file_name + ".dat", "wb"))
except:
    # if the file already exist it will load the history_data array 
    # you can add to it or modity it or just read it.
    history_data = pickle.load(open(file_name + ".dat", "rb"))
print(history_data) #this will print the history_data array that was stored in the file
foo = 5
history_data.append(foo)
print(history_data)
pickle.dump(history_data, open(file_name + ".dat", "wb")) # this saves the newly modified history_data to the file