i have an apache error for turkish charachter and django is the framework 25 minutes work

Our project programming language is Python 3.6.2. Operation system Centos [login to view URL] are using Apache/2.4.6, Django framework (1, 11, 6, 'final', 0) , and database MySQL 5.7.19. We get error at below when we use Turkish characters. We define " # -*- coding: utf-8 -*- " the source code encoding at top of Python soruce files but continue taking the same error. How can we fix this issue? *********************************** UnicodeEncodeError at /admin/adminpanel/abonebilgileri/3/change/ 'ascii' codec can't encode character u'\xd6' in position 6: ordinal not in range(128) Request Method: GET Request URL: http://x.x.x.x:8880/admin/xxxpanel/xxx/3/change/ Django Version: 1.11.4 Exception Type: UnicodeEncodeError Exception Value: 'ascii' codec can't encode character u'\xd6' in position 6: ordinal not in range(128) Exception Location: /usr/lib64/python2.7/site-packages/django/utils/[login to view URL] in force_text, line 80 Python Executable: /usr/bin/python Python Version: 2.7.5 Python Path: ['/var/www/xxx/xxx/xxxprj', '/usr/lib64/[login to view URL]', '/usr/lib64/python2.7', '/usr/lib64/python2.7/plat-linux2', '/usr/lib64/python2.7/lib-tk', '/usr/lib64/python2.7/lib-old', '/usr/lib64/python2.7/lib-dynload', '/usr/lib64/python2.7/site-packages', '/usr/lib64/python2.7/site-packages/gtk-2.0', '/usr/lib/python2.7/site-packages'] Server time: Pzt, 5 Şub 2018 06:30:13 +0000 ***********************************