code: def sequenceOfStrings(string):
      """
      A custom type for the argparse commandline parser.
      Accepts colon-separated lists of strings.
  
      Examples
      --------
  
      >>> parser.add_argument('argname', type=sequenceOfStrings, help='help')
      """
      return string.split(",")
  
imports: import argparse
  import itertools
  import os
label_desc: Use image node_id 2 for calling a global function with example usage: sequenceOfStrings(string) and returns: string