code: def render_pep440_post(pieces):
      """TAG[.postDISTANCE[.dev0]+gHEX] .
  
      The ".dev0" means dirty. Note that .dev0 sorts backwards
      (a dirty tree will appear "older" than the corresponding clean one),
      but you shouldn't be releasing software with -dirty anyways.
  
      Exceptions:
      1: no tags. 0.postDISTANCE[.dev0]
      """
      if pieces["closest-tag"]:
          rendered = pieces["closest-tag"]
          if pieces["distance"] or pieces["dirty"]:
              rendered += ".post%d" % pieces["distance"]
              if pieces["dirty"]:
                  rendered += ".dev0"
              rendered += plus_or_dot(pieces)
              rendered += "g%s" % pieces["short"]
      else:
          # exception #1
          rendered = "0.post%d" % pieces["distance"]
          if pieces["dirty"]:
              rendered += ".dev0"
          rendered += "+g%s" % pieces["short"]
      return rendered
  
imports: import configparser
  import errno
  import json
  import os
  import re
  import subprocess
  import sys
label_desc: Use image node_id 16 for calling a global function with example usage: render_pep440_post(pieces) and returns: rendered