Add IO times for list schedulers

Added:

• IO times for list schedulers.
• Tests for 100 percent test coverage of schedulers.
• A new example showing custom IO times.

Note that !470 (closed) and !469 (merged) must be merged first since I branched from there.

After that, I can do a rebase if desired.

b_asic/core_schedulers.py

@@ -124,7 +124,8 @@ class EarliestDeadlineScheduler(ListScheduler):
 
         deadlines = {}
         for op_id, start_time in schedule_copy.start_times.items():
-            deadlines[op_id] = start_time + schedule.sfg.find_by_id(op_id).latency
+            if not op_id.startswith("in"):
+                deadlines[op_id] = start_time + schedule.sfg.find_by_id(op_id).latency
 
         return sorted(deadlines, key=deadlines.get)
 
@@ -137,7 +138,10 @@ class LeastSlackTimeScheduler(ListScheduler):
         schedule_copy = copy.copy(schedule)
         ALAPScheduler().apply_scheduling(schedule_copy)
 
-        return sorted(schedule_copy.start_times, key=schedule_copy.start_times.get)
+        sorted_ops = sorted(
+            schedule_copy.start_times, key=schedule_copy.start_times.get
+        )
+        return [op for op in sorted_ops if not op.startswith("in")]
 
 
 class MaxFanOutScheduler(ListScheduler):
@@ -152,7 +156,8 @@ class MaxFanOutScheduler(ListScheduler):
         for op_id, start_time in schedule_copy.start_times.items():
             fan_outs[op_id] = len(schedule.sfg.find_by_id(op_id).output_signals)
 
-        return sorted(fan_outs, key=fan_outs.get, reverse=True)
+        sorted_ops = sorted(fan_outs, key=fan_outs.get, reverse=True)
+        return [op for op in sorted_ops if not op.startswith("in")]
 
 
 class HybridScheduler(ListScheduler):
@@ -199,4 +204,4 @@ class HybridScheduler(ListScheduler):
 
         sorted_op_list = [pair[0] for pair in fan_out_sorted_items]
 
-        return sorted_op_list
+        return [op for op in sorted_op_list if not op.startswith("in")]