[MOD] sequence [MOD] py

Removed prefix from sequence Corrected computation of ref

added 4 commits

• 6c4a4ac5...92f7bc7a - 3 commits from branch 12.0-stage
• 6f978ddf - Merge branch '12.0-stage' into 'minor_changes'

Compare with previous version

merged

mentioned in commit df56a81f