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44 lines
1.1 KiB
Python
44 lines
1.1 KiB
Python
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"""
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Simple str.split() parsing of input string
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usage example:
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python list_ops.py --input_list=$INPUT [--sep=","] [--op=<len|select>] [--elem=$INDEX]
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Args:
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- input_list: input string
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- sep (default ","): separator string
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- elem (default 0): integer index
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- op (default "select"): either `len` or `select`
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- len: prints len(input_list.split(sep))
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- select: prints input_list.split(sep)[elem]
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Typical usage would be in a bash script, e.g.:
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LIST_LEN=$(python list_ops.py --input_list=$INPUT --op=len)
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"""
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import tml.machines.environment as env
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from absl import app, flags
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FLAGS = flags.FLAGS
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flags.DEFINE_string("input_list", None, "string to parse as list")
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flags.DEFINE_integer("elem", 0, "which element to take")
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flags.DEFINE_string("sep", ",", "separator")
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flags.DEFINE_string("op", "select", "operation to do")
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def main(argv):
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split_list = FLAGS.input_list.split(FLAGS.sep)
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if FLAGS.op == "select":
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print(split_list[FLAGS.elem], flush=True)
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elif FLAGS.op == "len":
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print(len(split_list), flush=True)
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else:
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raise ValueError(f"operation {FLAGS.op} not recognized.")
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if __name__ == "__main__":
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app.run(main)
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