code: def _tf_version():
      try:
          import tensorflow
      except ImportError:
          return ""
      else:
          return tensorflow.__version__
  
imports: import time
  import warnings
  from guild import python_util
  from guild import util
  from guild.plugin import Plugin
label_desc: Use image node_id 1 for calling a global function with example usage: _tf_version() and returns: tensorflow, str