Log BrickPi3 motors

motor_log.py

#Licensed under Createive Commons Share Alike 4.0 
#https://creativecommons.org/licenses/by-sa/4.0/
#Created by Kevin Gray
#For use with the brickpi3 by Dexter Industries. https://www.dexterindustries.com/BrickPi/

import brickpi3
import datetime
import time

BP = brickpi3.BrickPi3()
now = datetime.datetime.now()

filename = 'log_' + str(now.year) + '-' + str(now.month) + '-' + str(now.day) + '.txt'
if os.path.exists(filename) == True:
    print ('hello')
    n = 1
    while True:
        filename = 'log' + str(n) + '_' + str(now.year) + '-' + str(now.month) + '-' + str(now.day) + '.txt'
        n += 1
        if os.path.exists(filename) == False:
            break
        else:
            pass
else:
    print('hi')

f = open(filename, 'w+')
i = 0
read_check = []

try:
    BP.set_motor_limits(BP.PORT_A, 200)
    BP.offset_motor_encoder(BP.PORT_A, BP.get_motor_encoder(BP.PORT_A)[0])
    BP.set_motor_position(BP.PORT_A, 360)
    while True:
        time.sleep(1)
        reading = BP.get_motor_status(BP.PORT_A)
        read_check.append(reading)
        print(read_check[i])
        f.write(str(read_check[i]) + '\n')
        i += 1
except KeyboardInterrupt:
    pass

f.close()
BP.reset_all()