add pydeps wip using modulefinder

doesn't appear to entirely work right, claims that it couldn't find
os.path for example. Need to somehow reduce the names to the top levels if that makes sense.

meta/classes-recipe/pydeps.bbclass

@@ -0,0 +1,22 @@
+inherit python3-dir
+
+PACKAGEFUNCS += "package_generate_pydeps"
+
+python package_generate_pydeps() {
+    import modulefinder
+    paths = (
+        d.expand("${RECIPE_SYSROOT}${PYTHON_SITEPACKAGES_DIR}"),
+        d.expand("${RECIPE_SYSROOT}${libdir}/${PYTHON_DIR}/")
+    )
+    finder = modulefinder.ModuleFinder(paths)
+
+    for pkg in d.getVar("PACKAGES").split():
+        for path in pkgfiles[pkg]:
+            if not path.endswith(".py"):
+                continue
+
+            bb.plain("Scanning %s" % path)
+            finder.load_file(path)
+            bb.plain("Modules found: " + " ".join(finder.modules.keys()))   
+            bb.plain("Modules not found: " + " ".join(finder.badmodules.keys()))   
+}

meta/recipes-devtools/python/python3-jsonschema_4.23.0.bb

@@ -49,3 +49,5 @@ RDEPENDS:${PN} += " \
 RDEPENDS:${PN}-tests = "${PN}"
 
 BBCLASSEXTEND = "native nativesdk"
+
+inherit pydeps