code: def dipy_version():
      """Check dipy version."""
      if no_dipy():
          return None
  
      return dipy.__version__
  
file_path: nipype/nipype/interfaces/dipy/base.py
imports: import os.path
  import inspect
  import numpy
  from ...None import logging
  from ..base import traits, File, isdefined, LibraryBaseInterface, BaseInterfaceInputSpec, TraitedSpec
label_desc: Use image node_id 2 for calling a global function with example usage: dipy_version() and returns: dipy, None