compare_ts

compare_ts.py

import sys
from datetime import datetime

def prepend_diff(input_file, output_file):
    # Read all lines from the input file
    with open(input_file, 'r') as file:
        lines = file.readlines()

    output_lines = []
    prev_timestamp = None

    for line in lines:
        try:
            # Extract the timestamp (assuming it's the first part of the line)
            timestamp_str = line.split()[0]  # Extract the timestamp portion
            # Trim the fractional seconds to 6 digits (microseconds)
            if "." in timestamp_str:
                timestamp_str = timestamp_str[:26] + "Z"  # Keep up to microseconds and add "Z"

            # Parse the timestamp in the format: '2025-01-16T04:37:19.234061Z'
            current_timestamp = datetime.strptime(timestamp_str, '%Y-%m-%dT%H:%M:%S.%fZ')
        except (ValueError, IndexError):
            # If no valid timestamp is found, add the line as-is and skip
            output_lines.append(line)
            continue

        if prev_timestamp is not None:
            # Calculate the difference in seconds
            diff = int((current_timestamp - prev_timestamp).total_seconds())
            # Prepend the difference to the current line
            output_lines.append(f"{diff} seconds {line}")
        else:
            output_lines.append(line)

        prev_timestamp = current_timestamp

    # Write the output to the output file
    with open(output_file, 'w') as file:
        file.writelines(output_lines)

if __name__ == '__main__':
    if len(sys.argv) < 2:
        print("Usage: python prepend_diff.py <input_file> [output_file]")
        sys.exit(1)

    input_file = sys.argv[1]
    output_file = sys.argv[2] if len(sys.argv) > 2 else 'output