code: def time_to_us(time_str):
      hh, mm, ss = map(int, time_str.split(":"))
      return (ss + 60 * (mm + 60 * hh)) * (10**6)
  
imports: import argparse
  import os
  import pandas
  from azureml.core import Run
label_desc: Use image node_id 1 for calling a global function with example usage: time_to_us(time_str) and returns: unknown