def __init__(self, lhs, rhs):
ExpressionWithLHS.__init__(self, rhs)
if not MathUtil.is_single_symbol(lhs):
err = 'Expecting a single symbol on the LHS; got: %s' % lhs
raise NineMLRuntimeError(err)
if not is_valid_lhs_target(lhs):
err = 'Invalid LHS target: %s' % lhs
raise NineMLRuntimeError(err)
self._lhs = lhs.strip()
def On(trigger, do=None, to=None):
if isinstance(do, (OutputEvent, basestring)):
do = [do]
elif do == None:
do = []
else:
pass
if isinstance(trigger, basestring):
if MathUtil.is_single_symbol(trigger):
return DoOnEvent(input_event=trigger, do=do, to=to)
else:
return DoOnCondition(condition=trigger, do=do, to=to)
elif isinstance(trigger, OnCondition):
return DoOnCondition(condition=trigger, do=do, to=to)
else:
err = "Unexpected Type for On() trigger: %s %s" % (type(trigger),
str(trigger))
raise NineMLRuntimeError(err)
def test_is_single_symbol(self):
# Signature: name(cls, expr)
# Returns ``True`` if the expression is a single symbol, possibly
# surrounded with white-spaces
#
# >>> is_single_symbol('hello')
# True
#
# >>> is_single_symbol('hello * world')
# False
self.assertTrue(MathUtil.is_single_symbol("t"))
self.assertTrue(MathUtil.is_single_symbol("var_1"))
self.assertTrue(MathUtil.is_single_symbol("var_long_name"))
self.assertTrue(MathUtil.is_single_symbol("_myName"))
self.assertFalse(MathUtil.is_single_symbol("r + y"))
self.assertFalse(MathUtil.is_single_symbol("r+y"))
self.assertFalse(MathUtil.is_single_symbol("sin(y)"))
