code: def python_revision():
      """Returns a string identifying the Python implementation
      revision.
  
      For CPython this is the SCM revision from which the
      Python binary was built.
  
      If not available, an empty string is returned.
  
      """
      return _sys_version()[3]
  
imports: import collections
  import os
  import re
  import sys
  import functools
  import itertools
label_desc: Use image node_id 34 for calling a global function with example usage: python_revision() and returns: _sys_version