code: def validate_template(template):
      template_with_only_brackets = [
          i for i in template if i in ["{", "}"]
      ]
      error_msg = (
          "Your template ("
          + template
          + ") is not in the correct format.\
                  Template must be in the format contains zero or more fields, \
                  each field specified by {field}\
                  For instance, it can be 'Context: {context} Question: {question}:"
      )
      if len(template_with_only_brackets) % 2 != 0:
          raise ValueError(error_msg)
      for i in range(0, len(template_with_only_brackets), 2):
          if not (
              template_with_only_brackets[i] == "{"
              and template_with_only_brackets[i + 1] == "}"
          ):
              raise ValueError(error_msg)
      return None
  
imports: import argparse
  import math
  import os
  import pathlib
  from collections import Counter
  import numpy
  import pandas
label_desc: Use image node_id 9 for calling a global function with example usage: validate_template(template) and returns: None