human
Complete the below
def emits_warning_on(db, *messages):

    ''''Mark a test as emitting a warning on a specific dialect.
    With no arguments, squelches all SAWarning failures.  Or pass one or more
    strings.
these will be matched to the root of the warning description by
    warnings.filterwarnings().
    Note that emits_warning_on does **not** assert that the warnings
    were in fact seen.'
    '''

Give me a the Python program you requested?
assistant
#Here is the Python program you requested.
    @decorator
    def decorate(fn, *args, **kw):
        with expect_warnings_on(db, assert_=False, *messages):
            return fn(*args, **kw)
    return decorate