class_docstr: A checkpoint within an experiment. It represents the metrics and the file or directory specified by `path` at a point in time during the experiment.
class_docstr_tok: ["A","checkpoint","within","an","experiment",".","It","represents","the","metrics","and","the","file","or","directory","specified","by","`","path","`","at","a","point","in","time","during","the","experiment","."]
code: def validate(self) -> List[str]:
      errors = []
  
      if self.path is not None and not isinstance(self.path, str):
          errors.append("path must be a string")
  
      if self.step is not None and not isinstance(self.step, int):
          errors.append("step must be an integer")
  
      if self.metrics is not None:
          if isinstance(self.metrics, dict):
              for key, value in self.metrics.items():
                  try:
                      json.dumps(value, cls=CustomJSONEncoder)
                  except (ValueError, TypeError, OverflowError):
                      errors.append(
                          "Failed to serialize the metric '{}' to JSON. Make sure it's only using basic types (str, int, float, bool, dict, list, None)".format(
                              key
                          )
                      )
          else:
              errors.append("metrics must be a dictionary")
  
      if (
          self.metrics is not None
          and self.primary_metric is not None
          and self.primary_metric.get("name") is not None
          and self.primary_metric["name"] not in self.metrics
      ):
          errors.append(
              "Primary metric '{}' is not defined in metrics".format(
                  self.primary_metric["name"]
              )
          )
  
      if (
          self.primary_metric is not None
          and self.primary_metric.get("goal") is not None
          and self.primary_metric["goal"].lower()
          not in (
              "maximize",
              "minimize",
          )
      ):
          errors.append(
              "Primary metric goal must be either 'maximize' or 'minimize'. "
              "For example: ('loss', 'minimize')"
          )
  
      if self.path is not None and isinstance(self.path, str):
          errors.extend(check_path("checkpoint", self.path))
  
      return errors
  
imports: import datetime
  import os
  import io
  import tempfile
  import json
  import sys
  import html
  from typing import Optional, Dict, Any, List, BinaryIO, TYPE_CHECKING, MutableSequence
  from .None import console
  from .json import CustomJSONEncoder
  from .metadata import rfc3339_datetime, parse_rfc3339
  from .validate import check_path
label_desc: Use image node_id 5 for calling the Checkpoint obj's underlying member method code with example usage: obj.validate() and returns: errors