class_docstr: Use mlflow to implement ExpManager.
code: def delete_exp(self, experiment_id=None, experiment_name=None):
      assert (
          experiment_id is not None or experiment_name is not None
      ), "Please input a valid experiment id or name before deleting."
      try:
          if experiment_id is not None:
              self.client.delete_experiment(experiment_id)
          else:
              experiment = self.client.get_experiment_by_name(
                  experiment_name
              )
              if experiment is None:
                  raise MlflowException(
                      "No valid experiment has been found."
                  )
              self.client.delete_experiment(experiment.experiment_id)
      except MlflowException as e:
          raise ValueError(
              f"Error: {e}. Something went wrong when deleting experiment. Please check if the name/id of the experiment is correct."
          ) from e
  
imports: from urllib.parse import urlparse
  import mlflow
  from filelock import FileLock
  from mlflow.exceptions import MlflowException, RESOURCE_ALREADY_EXISTS, ErrorCode
  from mlflow.entities import ViewType
  import os
  from typing import Optional, Text
  from .exp import MLflowExperiment, Experiment
  from ..config import C
  from .recorder import Recorder
  from ..log import get_module_logger
  from ..utils.exceptions import ExpAlreadyExistError
label_desc: Use image node_id 7 for calling the MLflowExpManager obj's underlying member method code with example usage: obj.delete_exp(experiment_id, experiment_name) without return types