bpo-33901: Add _gdbm._GDBM_VERSION (GH-7794)

* Fix also PyInit__gdbm() to catch errors.
* test.pythoninfo: add gdbm.version
* test_dbm_gnu now logs GDBM_VERSION when run in verbose mode.

* pythoninfo: rename function to collect_gdbm()

2 files changed, 21 insertions, 0 deletions

diff --git a/Lib/test/pythoninfo.py b/Lib/test/pythoninfo.py
index 9242a36bed..3958764a6a 100644
--- a/Lib/test/pythoninfo.py
+++ b/Lib/test/pythoninfo.py
@@ -525,6 +525,15 @@ def collect_cc(info_add):
     info_add('CC.version', text)
 
 
+def collect_gdbm(info_add):
+    try:
+        import _gdbm
+    except ImportError:
+        return
+
+    info_add('gdbm.GDBM_VERSION', '.'.join(map(str, _gdbm._GDBM_VERSION)))
+
+
 def collect_info(info):
     error = False
     info_add = info.add
@@ -552,6 +561,7 @@ def collect_info(info):
         collect_testcapi,
         collect_resource,
         collect_cc,
+        collect_gdbm,
 
         # Collecting from tests should be last as they have side effects.
         collect_test_socket,
diff --git a/Lib/test/test_dbm_gnu.py b/Lib/test/test_dbm_gnu.py
index 379601ad86..49f91705b5 100644
--- a/Lib/test/test_dbm_gnu.py
+++ b/Lib/test/test_dbm_gnu.py
@@ -8,6 +8,17 @@ from test.support import TESTFN, TESTFN_NONASCII, unlink
 filename = TESTFN
 
 class TestGdbm(unittest.TestCase):
+    @staticmethod
+    def setUpClass():
+        if support.verbose:
+            try:
+                import _gdbm
+                version = _gdbm._GDBM_VERSION
+            except (ImportError, AttributeError):
+                pass
+            else:
+                print(f"gdbm version: {version}")
+
     def setUp(self):
         self.g = None