old_contents: import os
  import sys
  import traceback
  
  test_pyjs = True
  test_std = False
  
  from astpprint import getAststr, printAst
  
  if test_pyjs:
      from lib2to3 import compiler as test_compiler
      from lib2to3.compiler.transformer import Transformer
      from lib2to3.compiler import parser as test_parser
  
  #g = Grammar()
  
  if test_std:
      import compiler
      import parser
  
  def compare_compilers(fname):
  
      path, fname_out = os.path.split(fname)
  
      f = open(fname)
      txt = f.read()
      f.close()
  
      if test_std:
          try:
              x1 = compiler.parseFile(fname)
              ys1 = getAststr(x1)
          except SyntaxError:
              ys1 = traceback.format_exc(limit=0)
              
      if test_pyjs:
          try:
              y = test_compiler.parseFile(fname)
              ys = getAststr(y)
  
          except SyntaxError:
              ys = traceback.format_exc(limit=1)
  
      if test_pyjs and test_std:
          if ys == ys1:
              print "passed"
              return
  
      print "failed."
  
      if test_pyjs:
          f = open(fname_out+".ast", "w")
          f.write(ys)
          f.close()
  
      if test_std:
          f = open(fname_out+".ast.std", "w")
          f.write(ys1)
          f.close()
  
  import sys
  for arg in sys.argv[1:]:
      print "test file", arg
      try:
          compare_compilers(arg)
      except:
          print >> sys.stderr, "exception in compile of ", arg
          traceback.print_exc()
          sys.stderr.flush()
  
  
new_contents: import os
  import sys
  import traceback
  
  test_pyjs = True
  test_std = False
  
  from astpprint import getAststr, printAst
  
  if test_pyjs:
      from lib2to3 import compiler as test_compiler
      from lib2to3.compiler import parser as test_parser
  
  #g = Grammar()
  
  if test_std:
      import compiler
      import parser
  
  def compare_compilers(fname):
  
      path, fname_out = os.path.split(fname)
  
      f = open(fname)
      txt = f.read()
      f.close()
  
      if test_std:
          try:
              x1 = compiler.parseFile(fname)
              ys1 = getAststr(x1)
          except SyntaxError:
              ys1 = traceback.format_exc(limit=0)
              
      if test_pyjs:
          try:
              y = test_compiler.parseFile(fname)
              ys = getAststr(y)
  
          except SyntaxError:
              ys = traceback.format_exc(limit=1)
  
      if test_pyjs and test_std:
          if ys == ys1:
              print "passed"
              return
  
      print "failed."
  
      if test_pyjs:
          f = open(fname_out+".ast", "w")
          f.write(ys)
          f.close()
  
      if test_std:
          f = open(fname_out+".ast.std", "w")
          f.write(ys1)
          f.close()
  
  import sys
  for arg in sys.argv[1:]:
      print "test file", arg
      try:
          compare_compilers(arg)
      except:
          print >> sys.stderr, "exception in compile of ", arg
          traceback.print_exc()
          sys.stderr.flush()
  
  
subject: complete rubbish for AssertionError statement