import argparse

import re

import json

def filter_logs(log_file, filters):

"""Filters log entries based on provided filters."""

filtered_entries = []

try:

with open(log_file, 'r') as f:

for line in f:

match = True

for filter_name, filter_value in filters.items():

if filter_name == "level":

if filter_value.lower() != line.lower().split()[0].lower():

match = False

break

elif filter_name == "message":

if filter_value.lower() not in line.lower():

match = False

break

elif filter_name == "time":

try:

time_str = line.split()[1] # Assuming time is the second element

if filter_value < time_str:

match = False

break

except (IndexError, ValueError):

match = False

break

if match:

filtered_entries.append(line.strip())

except FileNotFoundError:

print(f"Error: Log file '{log_file}' not found.")

return None

return filtered_entries

def main():

"""Parses command-line arguments and filters log entries."""

parser = argparse.ArgumentParser(description="Filter log entries from a file.")

parser.add_argument("log_file", help="Path to the log file.")

parser.add_argument("--filters", nargs='+', help="Filters to apply (e.g., level:error message:exception)")

args = parser.parse_args()

if not args.filters:

print("Usage: python filter_logs.py <log_file> --filters <filter1> <filter2> ...")

return

filters = {}

for filter_str in args.filters:

try:

name, value = filter_str.split(":", 1)

filters[name.strip()] = value.strip()

except ValueError:

print(f"Invalid filter format: {filter_str}. Use name:value")

return

filtered_entries = filter_logs(args.log_file, filters)

if filtered_entries:

for entry in filtered_entries:

print(entry)

if __name__ == "__main__":

main()