Fixed import of optimized Transformer

Import it if the C module is used, not just if it's available.

diff --git a/psycopg3/adapt.py b/psycopg3/adapt.py
index bc316402eb04ea091986c6bee3e6844324c2c990..33cd0af792fdc8b32c5d678ef3f4e1bad3ce6252 100644 (file)
--- a/psycopg3/adapt.py
+++ b/psycopg3/adapt.py
@@ -409,7 +409,6 @@ def _connection_from_context(
         raise TypeError(f"can't get a connection from {type(context)}")
 
 
-try:
+# Override it with fast object if available
+if pq.__impl__ == "c":
     from ._psycopg3 import Transformer  # noqa
-except ImportError:
-    pass