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#!/usr/local/bin/python3
"""Filter subtitles that match or don't match a particular pattern."""
import importlib
import srt_tools.utils
import logging
log = logging.getLogger(__name__)
def strip_to_matching_lines_only(subtitles, imports, func_str, invert, per_sub):
for import_name in imports:
real_import = importlib.import_module(import_name)
globals()[import_name] = real_import
raw_func = eval(func_str) # pylint: disable-msg=eval-used
if invert:
func = lambda line: not raw_func(line)
else:
func = raw_func
for subtitle in subtitles:
if per_sub:
if not func(subtitle.content):
subtitle.content = ""
else:
subtitle.content = "\n".join(
line for line in subtitle.content.splitlines() if func(line)
)
yield subtitle
def parse_args():
examples = {
"Only include Chinese lines": "srt lines-matching -m hanzidentifier -f hanzidentifier.has_chinese",
"Exclude all lines which only contain numbers": "srt lines-matching -v -f 'lambda x: x.isdigit()'",
}
parser = srt_tools.utils.basic_parser(description=__doc__, examples=examples)
parser.add_argument(
"-f", "--func", help="a function to use to match lines", required=True
)
parser.add_argument(
"-m",
"--module",
help="modules to import in the function context",
action="append",
default=[],
)
parser.add_argument(
"-s",
"--per-subtitle",
help="match the content of each subtitle, not each line",
action="store_true",
)
parser.add_argument(
"-v",
"--invert",
help="invert matching -- only match lines returning False",
action="store_true",
)
return parser.parse_args()
def main():
args = parse_args()
logging.basicConfig(level=args.log_level)
srt_tools.utils.set_basic_args(args)
matching_subtitles_only = strip_to_matching_lines_only(
args.input, args.module, args.func, args.invert, args.per_subtitle
)
output = srt_tools.utils.compose_suggest_on_fail(
matching_subtitles_only, strict=args.strict
)
try:
args.output.write(output)
except (UnicodeEncodeError, TypeError): # Python 2 fallback
args.output.write(output.encode(args.encoding))
if __name__ == "__main__": # pragma: no cover
main()
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