mirror of
https://github.com/twitter/the-algorithm-ml.git
synced 2024-11-16 21:29:24 +01:00
44 lines
1.1 KiB
Python
44 lines
1.1 KiB
Python
"""
|
|
Simple str.split() parsing of input string
|
|
|
|
usage example:
|
|
python list_ops.py --input_list=$INPUT [--sep=","] [--op=<len|select>] [--elem=$INDEX]
|
|
|
|
Args:
|
|
- input_list: input string
|
|
- sep (default ","): separator string
|
|
- elem (default 0): integer index
|
|
- op (default "select"): either `len` or `select`
|
|
- len: prints len(input_list.split(sep))
|
|
- select: prints input_list.split(sep)[elem]
|
|
|
|
Typical usage would be in a bash script, e.g.:
|
|
|
|
LIST_LEN=$(python list_ops.py --input_list=$INPUT --op=len)
|
|
|
|
"""
|
|
import tml.machines.environment as env
|
|
|
|
from absl import app, flags
|
|
|
|
|
|
FLAGS = flags.FLAGS
|
|
flags.DEFINE_string("input_list", None, "string to parse as list")
|
|
flags.DEFINE_integer("elem", 0, "which element to take")
|
|
flags.DEFINE_string("sep", ",", "separator")
|
|
flags.DEFINE_string("op", "select", "operation to do")
|
|
|
|
|
|
def main(argv):
|
|
split_list = FLAGS.input_list.split(FLAGS.sep)
|
|
if FLAGS.op == "select":
|
|
print(split_list[FLAGS.elem], flush=True)
|
|
elif FLAGS.op == "len":
|
|
print(len(split_list), flush=True)
|
|
else:
|
|
raise ValueError(f"operation {FLAGS.op} not recognized.")
|
|
|
|
|
|
if __name__ == "__main__":
|
|
app.run(main)
|