code: def base_version(self):
      parts = []
  
      # Epoch
      if self._version.epoch != 0:
          parts.append("{0}!".format(self._version.epoch))
  
      # Release segment
      parts.append(".".join(str(x) for x in self._version.release))
  
      return "".join(parts)
  
imports: import collections
  import itertools
  import re
label_desc: Use image node_id 5 for calling the Version obj's underlying member method code with example usage: obj.base_version() and returns: str