Merge pull request #538 from eendebakpt/fix/sympy_warning

fix import warning, see sympy/sympy#15536

qupulse/pulses/table_pulse_template.py

@@ -14,6 +14,7 @@
 
 import numpy as np
 import sympy
+from sympy.logic.boolalg import BooleanAtom
 
 from qupulse.utils.types import ChannelID
 from qupulse.serialization import Serializer, PulseRegistryType
@@ -129,7 +130,7 @@ def __init__(self, entries: Dict[ChannelID, Sequence[EntryInInit]],
                             for previous_entry, entry in zip(channel_entries, channel_entries[1:])]
 
             # test if any condition is already dissatisfied
-            if any(isinstance(eq, sympy.boolalg.BooleanAtom) and bool(eq) is False
+            if any(isinstance(eq, BooleanAtom) and bool(eq) is False
                    for eq in inequalities):
                 raise ValueError('Table pulse template has impossible parametrization')