#!/usr/bin/env python
"""Demonstrate a lib2to3 parsing bug."""

from __future__ import print_function
import lib2to3.pgen2.driver
import lib2to3.pygram
import sys

sample_code = """
def function(kwargs=None):
  u = dummy(**kwargs if kwargs else dict())

def dummy(*args, **kwargs):
  pass

function()
function(kwargs={'a':3})
"""

exec(sample_code)  # Just to demonstrate that Python likes it.

driver = lib2to3.pgen2.driver.Driver(lib2to3.pygram.python_grammar)
driver.parse_string(sample_code)
print('PASS')
sys.exit(0)