add btree & btreezone to __all__

diff --git a/dns/__init__.py b/dns/__init__.py
index a4249b9e7207639a0932109e5d38e7db0b732fca..85ae226d3630e0877c961bef96ec954de09c9252 100644 (file)
--- a/dns/__init__.py
+++ b/dns/__init__.py
@@ -21,6 +21,8 @@ __all__ = [
     "asyncbackend",
     "asyncquery",
     "asyncresolver",
+    "btree.py",
+    "btreezone.py",
     "dnssec",
     "dnssecalgs",
     "dnssectypes",