code: def validate_slicing_string(slicing_string):
      """Validate a slicing string.
  
      Check if the input string contains only brackets, digits, commas and
      colons that are valid characters in numpy-style array slicing.
  
      Args:
        slicing_string: (str) Input slicing string to be validated.
  
      Returns:
        (bool) True if and only if the slicing string is valid.
      """
  
      return bool(re.search(r"^\[(\d|,|\s|:)+\]$", slicing_string))
  
imports: import argparse
  import ast
  import re
  import sys
label_desc: Use image node_id 4 for calling a global function with example usage: validate_slicing_string(slicing_string) and returns: bool