Make Python rules in Bazel actually work.
In particular: add a BazelPythonSemantics implementation and the respective RuleConfiguredTarget factories, rule class definitions and hook them up with BazelRuleClassProvider. Add implicit dependencies (2to3 is just a stub script for now that always fails) and a tiny exampe.
--
MOS_MIGRATED_REVID=89691827
diff --git a/examples/py_native/lib.py b/examples/py_native/lib.py
new file mode 100644
index 0000000..44522e0
--- /dev/null
+++ b/examples/py_native/lib.py
@@ -0,0 +1,5 @@
+"""A tiny example binary for the native Python rules of Bazel."""
+
+
+def GetNumber():
+ return 42
