class_docstr: path implementation that offers access to (possibly remote) subversion
  repositories. 
docstr: return an opened file with the given mode. 
code: def open(self, mode="r"):
      """return an opened file with the given mode."""
      if mode not in (
          "r",
          "rU",
      ):
          raise ValueError("mode %r not supported" % (mode,))
      assert self.check(
          file=1
      )  # svn cat returns an empty file otherwise
      if self.rev is None:
          return self._svnpopenauth(
              'svn cat "%s"' % (self._escape(self.strpath),)
          )
      else:
          return self._svnpopenauth(
              'svn cat -r %s "%s"'
              % (self.rev, self._escape(self.strpath))
          )
  
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 11 for calling the SvnCommandPath obj's underlying member method code with example usage: obj.open(mode) and returns: self, self