Locale issue (ValueError: unknown locale: UTF-8) with odoo 9

When running odoo using service command in Ubuntu 16.04 it run smoothly, but when run it using odoo.py i have error Locale issue (ValueError: unknown locale: UTF-8). 

It solved by adding below script to etc/default/locale :

export LC_ALL=en_US.UTF-8

export LANG="en_US.UTF-8"