fix custom pulse initialisation so that it works both with strings an…

…d np arrays

src/qibolab/pulses.py

@@ -709,11 +709,24 @@ def __init__(self, envelope_i, envelope_q=None):
 
         self.name = "Custom"
         self.pulse: Pulse = None
-        self.envelope_i: np.ndarray = np.array(literal_eval(envelope_i))
-        if envelope_q is not None:
-            self.envelope_q: np.ndarray = np.array(literal_eval(envelope_q))
-        else:
-            self.envelope_q = self.envelope_i
+        if isinstance(envelope_i, str):
+            self.envelope_i: np.ndarray = np.array(literal_eval(envelope_i))
+            if envelope_q is not None:
+                self.envelope_q: np.ndarray = np.array(literal_eval(envelope_q))
+            else:
+                self.envelope_q = self.envelope_i
+        elif isinstance(envelope_i, list):
+            self.envelope_i: np.ndarray = np.array(envelope_i)
+            if envelope_q is not None:
+                self.envelope_q: np.ndarray = np.array(envelope_q)
+            else:
+                self.envelope_q = self.envelope_i
+        elif isinstance(envelope_i, np.ndarray):
+            self.envelope_i: np.ndarray = envelope_i
+            if envelope_q is not None:
+                self.envelope_q: np.ndarray = envelope_q
+            else:
+                self.envelope_q = self.envelope_i
 
     def envelope_waveform_i(self, sampling_rate=SAMPLING_RATE) -> Waveform:
         """The envelope waveform of the i component of the pulse."""