code: def sequenceOfFloats(string):
      """
      A custom type for the argparse commandline parser.
      Accepts only colon-separated lists of valid float values.
  
      Examples
      --------
  
      >>> parser.add_argument('argname', type=sequenceOfFloats, help='help')
  
      """
      value = list(map(float, string.split(",")))
      return value
  
imports: import argparse
  import itertools
  import os
label_desc: Use image node_id 9 for calling a global function with example usage: sequenceOfFloats(string) and returns: value