sympy 1.4 support

qupulse/pulses/table_pulse_template.py

@@ -95,6 +95,10 @@ def __init__(self, entries: Dict[ChannelID, Sequence[EntryInInit]],
         AtomicPulseTemplate.__init__(self, identifier=identifier, measurements=measurements)
         ParameterConstrainer.__init__(self, parameter_constraints=parameter_constraints)
 
+        if not entries:
+            raise ValueError("Cannot construct an empty TablePulseTemplate (no entries given). There is currently no "
+                             "specific reason for this. Please submit an issue if you need this 'feature'.")
+
         self._entries = dict((ch, list()) for ch in entries.keys())
         for channel, channel_entries in entries.items():
             if len(channel_entries) == 0:

tests/pulses/table_pulse_template_tests.py

@@ -224,7 +224,7 @@ def test_get_entries_auto_insert(self) -> None:
     def test_empty_instantiated(self) -> None:
         with self.assertRaises(TypeError):
             TablePulseTemplate()
-        with self.assertRaises(ValueError):
+        with self.assertRaisesRegex(ValueError, 'empty TablePulseTemplate'):
             TablePulseTemplate(entries=dict())
 
     def test_get_entries_instantiated_two_equal_entries(self) -> None: