code: def call_pip_install(source):
      return call(_get_pip_install() + [source])
  
file_path: nni/nni/tools/nnictl/command_utils.py
imports: from subprocess import call, check_output
  import sys
  import os
  import time
  import signal
  import psutil
  from .common_utils import print_error, print_warning
label_desc: Use image node_id 8 for calling a global function with example usage: call_pip_install(source) and returns: call