infrasound_logger.py

import serial
from datetime import datetime

def get_infrasound_reading():
    data = int(ser.readline())
    time = datetime.strftime(datetime.utcnow(), '%m-%d-%YT%H:%M:%S.%f')
    return time, data

def get_new_hourly_file():
    current_file_time = datetime.utcnow()
    fname = datetime.strftime(current_file_time, '%Y%m%dT%H.txt')
    print(fname)
    return open(fname, 'a'), current_file_time

ser =  serial.Serial('COM10')
ser.flush()

f, current_file_time = get_new_hourly_file()

# Read/write main loop
try:
    while True:
        try:
            time, data = get_infrasound_reading()
            f.write('%s, %d\n' %(time, data))
        except ValueError:
            print('Format Error')

        # If it's time for a new hourly file
        if datetime.utcnow().hour != current_file_time.hour:
            f.close()
            f, current_file_time = get_new_hourly_file()

except KeyboardInterrupt:
    pass