code: def paste_mashes(sketches, pasted_mash, force = False):
      
      if os.path.isfile(pasted_mash):
          if force:
              subprocess.Popen(['rm', pasted_mash]).wait()
          else:
              return
      pasted_mash = pasted_mash.rsplit('.msh')[0]
      mash_cmd = ['/opt/bin/bio/mash', 'paste', pasted_mash]
      mash_cmd.extend(sketches)
      process = subprocess.Popen(mash_cmd)
      process.wait()
      return
docs: Combine mash files into single sketch
      Input:
          sketches <list[str]>  -- paths to sketch files
          pasted_mash <str>     -- path to output mash file
          force <boolean>     -- force overwrite of all mash file