code: def try_to_get_dask_client(n_workers, n_gpus, iface):
      daskConnection = Settings.data["TestSettings"].get(
          "daskConnection"
      )
      if (daskConnection is not None) or (
          type(daskConnection) is not str
      ):
          if n_gpus < 1:
              raise ValueError("n gpus must be at least 1")
          try:
              if daskConnection == "local":
                  cluster = LocalBlazingSQLCluster(
                      n_gpus, n_workers=n_workers
                  )
                  # cluster = LocalBlazingSQLCluster(n_gpus,  n_workers=n_workers,
                  #   interface=iface,
                  #    protocol="ucx",
                  #    enable_tcp_over_ucx=True,
                  #    enable_infiniband=False,
                  #    enable_nvlink=False,
                  #    # asynchronous=True,
                  # )
                  return Client(cluster)
              else:
                  if daskConnection.endswith(
                      ".json"
                  ):  # assuming a scheduler file
                      return Client(scheduler_file=daskConnection)
                  else:
                      return Client(daskConnection)
          except Exception as e:
              # TODO: exceptions from cluster creation or dask connection
              raise EnvironmentError(
                  "WARNING: Could not connect to dask: "
                  + daskConnection
                  + " ... error was "
                  + str(e)
              )
      raise ValueError(
          "ERROR: Bad dask connection '%s'" % daskConnection
      )
  
imports: import copy
  import os
  from blazingsql import BlazingContext, DataType
  from dask.distributed import Client
  from dask_cuda import LocalCUDACluster
  from dask_cuda.utils import CPUAffinity, get_cpu_affinity
  from Configuration import ExecutionMode
  from Configuration import Settings
  from DataBase import createSchema
label_desc: Use image node_id 4 for calling a global function with example usage: try_to_get_dask_client(n_workers, n_gpus, iface) and returns: Client, Client, Client