Converts iterated data to timed data. For use with OpenBCI output files.

IteratedToTimed.py

import argparse

parser = argparse.ArgumentParser()
parser.add_argument("in_file", type=str)
parser.add_argument("out_file", type=str)
args = parser.parse_args()

inFile = open(args.in_file,'r')
outFile = open(args.out_file,'w')

for index, line in enumerate(inFile):
  if not '%' in line:
    lineTime = (index - 5) * 0.000015625 # 2nd value is 1/(250 Hz * 256 cycles)
    writeString = str('%8.9f' % lineTime) + line[line.find(","):]
    outFile.write(writeString)

inFile.close()
outFile.close()
print("File",args.in_file,"converted to",args.out_file)