I use QGIS 2.14.3-Essen. The auto-complete function works without any problems in the python console, but it does not work in the QGIS python editor. I also tried it on another PC running QGIS 2.14.3 - essen-based, both of which worked well. I even tried to re-install QGIS, but still was not able to solve this problem.
How do I solve this problem?