code: def print_groups(filename):
      """
      Print the image set groups for this pipeline
  
      This function outputs a JSON string to the console composed of a list
      of the groups in the pipeline image set. Each element of the list is
      a two-tuple whose first element is a key/value dictionary of the
      group's key and the second is a tuple of the image numbers in the group.
      """
      path = os.path.expanduser(filename)
  
      m = Measurements(filename=path, mode="r")
  
      metadata_tags = m.get_grouping_tags_or_metadata()
  
      groupings = m.get_groupings(metadata_tags)
  
      # Groupings are np.int64 which cannot be dumped to json
      groupings_export = []
      for g in groupings:
          groupings_export.append(
              (g[0], [int(imgnr) for imgnr in g[1]])
          )
  
      json.dump(groupings_export, sys.stdout)
  
imports: import io
  import json
  import logging
  import logging.config
  import optparse
  import os
  import os.path
  import re
  import sys
  import tempfile
  import urllib.parse
  import h5py
  import matplotlib
  import numpy
  import pkg_resources
  from cellprofiler_core.constants.measurement import EXPERIMENT
  from cellprofiler_core.constants.measurement import GROUP_INDEX
  from cellprofiler_core.constants.measurement import GROUP_NUMBER
  from cellprofiler_core.constants.measurement import IMAGE
  from cellprofiler_core.constants.pipeline import M_PIPELINE, EXIT_STATUS
  from cellprofiler_core.measurement import Measurements
  from cellprofiler_core.object import ObjectSet
  from cellprofiler_core.pipeline import LoadException
  from cellprofiler_core.pipeline import Pipeline
  from cellprofiler_core.preferences import get_image_set_file
  from cellprofiler_core.preferences import get_temporary_directory
  from cellprofiler_core.preferences import set_conserve_memory
  from cellprofiler_core.preferences import set_force_bioformats
  from cellprofiler_core.preferences import set_allow_schema_write
  from cellprofiler_core.preferences import set_always_continue
  from cellprofiler_core.preferences import set_awt_headless
  from cellprofiler_core.preferences import set_data_file
  from cellprofiler_core.preferences import set_default_image_directory
  from cellprofiler_core.preferences import set_default_output_directory
  from cellprofiler_core.preferences import set_headless
  from cellprofiler_core.preferences import set_image_set_file
  from cellprofiler_core.preferences import set_plugin_directory
  from cellprofiler_core.preferences import set_temporary_directory
  from cellprofiler_core.preferences import set_widget_inspector
  from cellprofiler_core.utilities.core.workspace import is_workspace_file
  from cellprofiler_core.utilities.hdf5_dict import HDF5FileList
  from cellprofiler_core.utilities.java import start_java, stop_java
  from cellprofiler_core.utilities.measurement import load_measurements
  from cellprofiler_core.utilities.zmq import join_to_the_boundary
  from cellprofiler_core.worker import aw_parse_args
  from cellprofiler_core.worker import main
  from cellprofiler_core.workspace import Workspace
  from cellprofiler_core.reader import activate_readers
label_desc: Use image node_id 7 for calling a global function with example usage: print_groups(filename) without return types