code: def eval_fn(net, eval_dataset, num_workers):
      miou, _, _, _, _ = evaluate(
          net, eval_dataset, num_workers=num_workers, print_detail=False
      )
      return miou
  
file_path: PaddleSeg/deploy/slim/prune/prune.py
imports: import argparse
  import os
  import shutil
  from functools import partial
  import yaml
  import paddle
  from paddleslim.dygraph import L1NormFilterPruner
  from paddleslim.analysis import dygraph_flops
  from paddleseg.cvlibs import Config, SegBuilder
  from paddleseg.core.val import evaluate
  from paddleseg.core.train import train
  from paddleseg.utils import logger, utils
label_desc: Use image node_id 2 for calling a global function with example usage: eval_fn(net, eval_dataset, num_workers) and returns: miou