class_docstr: path implementation that offers access to (possibly remote) subversion
  repositories. 
docstr: export to a local path
  
  topath should not exist prior to calling this, returns a
  py.path.local instance
code: def export(self, topath):
      """export to a local path
  
      topath should not exist prior to calling this, returns a
      py.path.local instance
      """
      topath = py.path.local(topath)
      args = [
          '"%s"' % (self._escape(self),),
          '"%s"' % (self._escape(topath),),
      ]
      if self.rev is not None:
          args = ["-r", str(self.rev)] + args
      self._svncmdexecauth("svn export %s" % (" ".join(args),))
      return topath
  
imports: import os, sys, time, re
  import py
  from py import path, process
  from py._path import common
  from py._path import svnwc
  from py._path.cacheutil import BuildcostAccessCache, AgingCache
label_desc: Use image node_id 17 for calling the SvnCommandPath obj's underlying member method code with example usage: obj.export(topath) and returns: topath