code: def freeze_parameters_except(model, regex_patterns):
      """
      Freezes all layers of the given model except for the layers that match given regex patterns.
      Periods in the patterns are treated as literal periods, not as wildcard characters.
  
      Parameters:
      - model (nn.Module): The PyTorch model to be modified.
      - regex_patterns (list of str): List of regex patterns to match layer names to keep unfrozen.
  
      Returns:
      None; the model is modified in place.
      """
      # Escape periods and compile the regex patterns
      compiled_patterns = [
          re.compile(pattern.replace(".", "\\."))
          for pattern in regex_patterns
      ]
  
      # First, freeze all parameters in the model
      for param in model.parameters():
          param.requires_grad = False
  
      # Unfreeze layers that match the regex patterns
      for name, param in model.named_parameters():
          if any(pattern.match(name) for pattern in compiled_patterns):
              if is_main_process():
                  LOG.debug(f"unfreezing {name}")
              param.requires_grad = True
  
imports: import logging
  import re
  from axolotl.utils.distributed import is_main_process
label_desc: Use image node_id 1 for calling a global function with example usage: freeze_parameters_except(model, regex_patterns) without return types