Add timestamp-lines script to annotate lines with timestamps

bin/timestamp-lines

@@ -0,0 +1,33 @@
+#! /usr/bin/env python
+
+import argparse
+import sys
+import time
+
+def process_lines(in_file, out_file, fmt="%Y-%m-%d %H:%M:%S: "):
+	"""
+	Reads lines from a file-like object in_file, prefixes them
+	with a timestamp according to the provided format,
+	and writes them into the file-like object out_file.
+	
+	Typically in_file is stdin, out_file is stdout.
+	"""
+	
+	for line in in_file:
+		out_file.write(time.strftime(fmt, time.localtime()) + line)
+		out_file.flush()
+
+if __name__ == "__main__":
+	# parse command line args
+	parser = argparse.ArgumentParser(description="Annotate lines with timestamps")
+	parser.add_argument("-i", "--infile", help="Input file, defaults to stdin")
+	parser.add_argument("-o", "--outfile", help="Output file, defaults to stdout")
+	parser.add_argument("-f", "--format", help="Timestamp format (strftime style)", default="%Y-%m-%d %H:%M:%S: ")
+	args = parser.parse_args()
+	
+	# process lines
+	process_lines(
+		open(args.infile) if args.infile else sys.stdin,
+		open(args.outfile, "w") if args.outfile else sys.stdout,
+		args.format
+	)