meh  ~  devel  gst-build  cat problem.py
from gi.repository import Gst, GstPbutils
 meh  ~  devel  gst-build  python3 problem.py
problem.py:1: PyGIWarning: Gst was imported without specifying a version first. Use gi.require_version('Gst', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gst, GstPbutils
/usr/lib/python3.6/site-packages/gi/module.py:176: Warning: g_array_append_vals: assertion 'array' failed
  g_type = info.get_g_type()
/usr/lib/python3.6/site-packages/gi/module.py:176: Warning: g_hash_table_lookup: assertion 'hash_table != NULL' failed
  g_type = info.get_g_type()
/usr/lib/python3.6/site-packages/gi/module.py:176: Warning: g_hash_table_insert_internal: assertion 'hash_table != NULL' failed
  g_type = info.get_g_type()
problem.py:1: PyGIWarning: GstPbutils was imported without specifying a version first. Use gi.require_version('GstPbutils', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gst, GstPbutils
 meh  ~  devel  gst-build 