connection: add printed context support

Add the possibility to add the no_printed flag when creating the sysrepo
session to avoid loading the context from the shared memory. Apply it by
default to keep the behavior as before.
The printed context is valuable to get a the sysrepo config/state
faster but some operations on the context itself do not work.
For instance printing and parsing a yang model will fail.

Link: https://github.com/sysrepo/sysrepo/blob/v4.2.10/README.md#printed-context

Signed-off-by: Jeremie Leska <[email protected]>

Author: jeremie6wind

sysrepo/connection.py

@@ -36,13 +36,18 @@ class SysrepoConnection:
 
     __slots__ = ("cdata",)
 
-    def __init__(self, cache_running: bool = False):
+    def __init__(self, cache_running: bool = False, not_printed: bool = True):
         """
         :arg cache_running:
             Always cache running datastore data which makes mainly repeated retrieval of
             data much faster. Affects all sessions created on this connection.
+        :arg not_printed:
+            The context is created from a sysrepo shared memory and is loaded faster.
+            Some operations on the context do not work.
         """
         ctx_flags = 0
+        if not_printed:
+            ctx_flags |= lib.SR_CTX_NO_PRINTED
 
         # mandatory flag to work with libyang-python
         ctx_flags |= lib.SR_CTX_SET_PRIV_PARSED

tests/test_connection.py

@@ -87,3 +87,9 @@ def test_conn_get_module_infos(self):
             self.assertEqual(pwd.getpwnam(owner).pw_uid, os.geteuid())
             self.assertEqual(grp.getgrnam(group).gr_gid, os.getegid())
             self.assertEqual(perm, 0o600)
+
+    def test_conn_start_session_with_printed_context(self):
+        with sysrepo.SysrepoConnection(not_printed=False) as conn:
+            sess = conn.start_session()
+            self.assertEqual(sess.get_datastore(), "running")
+            sess.stop()