deindentify.py

import pyedflib
import numpy as np
import sys
from shutil import copyfile
import datetime

# copy input as output
copyfile(sys.argv[1], sys.argv[2])

# read input and get number of signals
f = pyedflib.EdfReader(sys.argv[1])
print(f.getStartdatetime())
n = f.signals_in_file

# write into output the current datetime
o = pyedflib.EdfWriter(sys.argv[2], 1)
now = datetime.datetime.now()
o.setStartdatetime(now)