Transform a timestamp into int (microseconds precision)

timestamp.py

import time
import datetime

timestamp_format = '%Y-%m-%d %H:%M:%S,%f'      # 2018-06-28 13:34:04,776
epoch = datetime.datetime.utcfromtimestamp(0)  # timestamp at 1970-01-01 00:00:00

def timestamp_to_int(ts):
    dt = datetime.datetime.strptime(ts, timestamp_format)
    return int((dt-epoch).total_seconds()*1000)