def warnpy3k(message, category=None, stacklevel=1):
    """Issue a deprecation warning for Python 3.x related changes.

    Warnings are omitted unless Python is started with the -3 option.
    """
    if sys.py3kwarning:
        if category is None:
            category = DeprecationWarning
        warn(message, category, stacklevel+1)
def warnpy3k(message, category=None, stacklevel=1):
    """Issue a deprecation warning for Python 3.x related changes.

    Warnings are omitted unless Python is started with the -3 option.
    """
    if sys.py3kwarning:
        if category is None:
            category = DeprecationWarning
        warn(message, category, stacklevel+1)
def warnpy3k ( message , category = None , stacklevel = 1 ) : if sys . py3kwarning : if category is None : category = DeprecationWarning warn ( message , category , stacklevel + 1 )
Issue a deprecation warning for Python 3.x related changes.

    Warnings are omitted unless Python is started with the -3 option.
Issue a deprecation warning for Python 3 . x related changes .