import argparse
 
 
def remove_lines_from_keyword(filename, keywords, before, after):
    with open(filename, "r") as f:
        lines = f.readlines()
 
    display_flags = [True] * len(lines)
    for i, line in enumerate(lines):
        if any(keyword in line for keyword in keywords):
            from_ = max(0, i - before)
            to_ = min(len(lines), i + after + 1)
            display_flags[from_:to_] = [False] * (to_ - from_)
 
    for line, display_flag in zip(lines, display_flags):
        if display_flag:
            print(line, end="")
 
 
def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("-B", "--before-context", type=int, default=0)
    parser.add_argument("-A", "--after-context", type=int, default=0)
    parser.add_argument("filename")
    parser.add_argument("keyword", nargs="*")
    args = parser.parse_args()
    remove_lines_from_keyword(
        args.filename, args.keyword, args.before_context, args.after_context
    )
 
 
if __name__ == "__main__":
    main()
 

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