add diffing script

pylib/tools/diff-sched.py

@@ -0,0 +1,35 @@
+# a quick script to compare methods in the two schedulers
+
+import inspect
+from anki.sched import Scheduler as S1
+from anki.schedv2 import Scheduler as S2
+from difflib import SequenceMatcher, unified_diff
+import sys
+
+s1map = {}
+for k, v in S1.__dict__.items():
+    if not callable(v):
+        continue
+    s1map[k] = v
+
+s2map = {}
+for k, v in S2.__dict__.items():
+    if not callable(v):
+        continue
+    s2map[k] = v
+
+for k, v in s1map.items():
+    if k not in s2map:
+        continue
+
+    s1b = inspect.getsource(v)
+    s2b = inspect.getsource(s2map[k])
+    ratio = SequenceMatcher(None, s1b, s2b).ratio()
+
+    if ratio >= 0.90:
+        print("*" * 80)
+        print(k, "%d%%" % (ratio * 100))
+        sys.stdout.writelines(
+            "\n".join(unified_diff(s1b.splitlines(), s2b.splitlines(), lineterm=""))
+        )
+        print()