diff --git a/python/ql/src/meta/debug/DebugStats.ql b/python/ql/src/meta/debug/DebugStats.ql
new file mode 100644
index 00000000000..5ebbe963943
--- /dev/null
+++ b/python/ql/src/meta/debug/DebugStats.ql
@@ -0,0 +1,101 @@
+import python
+
+from string msg, int cnt, int sort
+where
+  sort = 0 and
+  msg = "Lines of code in DB" and
+  cnt = sum(Module m | | m.getMetrics().getNumberOfLinesOfCode())
+  or
+  sort = 1 and
+  msg = "Lines of code in repo" and
+  cnt =
+    sum(Module m | exists(m.getFile().getRelativePath()) | m.getMetrics().getNumberOfLinesOfCode())
+  or
+  sort = 2 and
+  msg = "Files" and
+  cnt = count(File f)
+  or
+  sort = 10 and msg = "----------" and cnt = 0
+  or
+  sort = 11 and
+  msg = "Modules" and
+  cnt = count(Module m)
+  or
+  sort = 12 and
+  msg = "Classes" and
+  cnt = count(Class c)
+  or
+  sort = 13 and
+  msg = "Functions" and
+  cnt = count(Function f)
+  or
+  sort = 14 and
+  msg = "async functions" and
+  cnt = count(Function f | f.isAsync())
+  or
+  sort = 15 and
+  msg = "*args params" and
+  cnt = count(Function f | f.hasVarArg())
+  or
+  sort = 16 and
+  msg = "**kwargs params" and
+  cnt = count(Function f | f.hasKwArg())
+  or
+  sort = 20 and msg = "----------" and cnt = 0
+  or
+  sort = 21 and
+  msg = "call" and
+  cnt = count(Call c)
+  or
+  sort = 22 and
+  msg = "for loop" and
+  cnt = count(For f)
+  or
+  sort = 23 and
+  msg = "comprehension" and
+  cnt = count(Comp c)
+  or
+  sort = 24 and
+  msg = "attribute" and
+  cnt = count(Attribute a)
+  or
+  sort = 25 and
+  msg = "assignment" and
+  cnt = count(Assign a)
+  or
+  sort = 26 and
+  msg = "await" and
+  cnt = count(Await a)
+  or
+  sort = 27 and
+  msg = "yield" and
+  cnt = count(Yield y)
+  or
+  sort = 28 and
+  msg = "with" and
+  cnt = count(With w)
+  or
+  sort = 29 and
+  msg = "raise" and
+  cnt = count(Raise r)
+  or
+  sort = 30 and
+  msg = "return" and
+  cnt = count(Return r)
+  or
+  sort = 31 and
+  msg = "match" and
+  cnt = count(MatchStmt m)
+  or
+  sort = 32 and
+  msg = "from ... import ..." and
+  cnt = count(Import i | i.isFromImport())
+  or
+  sort = 33 and
+  msg = "import ..." and
+  cnt = count(Import i | not i.isFromImport())
+  or
+  sort = 34 and
+  msg = "import *" and
+  cnt = count(ImportStar i)
+select sort, msg, cnt order by sort
diff --git a/python/ql/src/meta/debug/SimpleClassDebug.ql b/python/ql/src/meta/debug/SimpleClassDebug.ql
new file mode 100644
index 00000000000..017d3f858e9
--- /dev/null
+++ b/python/ql/src/meta/debug/SimpleClassDebug.ql
@@ -0,0 +1,26 @@
+/**
+ * Fill in your class name and file path below, to inspect the class hierarchy.
+ */
+
+import python
+import semmle.python.dataflow.new.internal.DataFlowPublic
+import semmle.python.dataflow.new.internal.DataFlowPrivate
+
+predicate interestingClass(Class cls) {
+  cls.getName() = "YourClassName"
+  // and cls.getLocation().getFile().getAbsolutePath().matches("%/folder/file.py")
+}
+
+query predicate superClasses(Class cls, Class super_) {
+  interestingClass(cls) and
+  super_ = getADirectSuperclass+(cls)
+}
+
+query predicate subClasses(Class cls, Class super_) {
+  interestingClass(cls) and
+  super_ = getADirectSubclass+(cls)
+}
+
+from Class cls
+where interestingClass(cls)
+select cls