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