The SECRET_KEY setting must not be empty 这个问题怎么解决的

[cain123]

{"error":"IndexAlreadyExistsException[[readthedocs] already exists]","status":400}+ cd /app/readthedocs

• ln -s ../manage.py .
• PYTHON=/venv/bin/python
• /venv/bin/python manage.py syncdb --noinput
  Traceback (most recent call last):
  File "manage.py", line 11, in
  execute_from_command_line(sys.argv)
  File "/venv/local/lib/python2.7/site-packages/django/core/management/init.py", line 353, in execute_from_command_line
  utility.execute()
  File "/venv/local/lib/python2.7/site-packages/django/core/management/init.py", line 345, in execute
  self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/venv/local/lib/python2.7/site-packages/django/core/management/init.py", line 185, in fetch_command
  settings.INSTALLED_APPS
  File "/venv/local/lib/python2.7/site-packages/django/conf/init.py", line 55, in getattr
  self._setup(name)
  File "/venv/local/lib/python2.7/site-packages/django/conf/init.py", line 43, in _setup
  self._wrapped = Settings(settings_module)
  File "/venv/local/lib/python2.7/site-packages/django/conf/init.py", line 120, in init
  raise ImproperlyConfigured("The SECRET_KEY setting must not be empty.")
  django.core.exceptions.ImproperlyConfigured: The SECRET_KEY setting must not be empty.
• /venv/bin/python manage.py migrate
  Traceback (most recent call last):
  File "manage.py", line 11, in
  execute_from_command_line(sys.argv)
  File "/venv/local/lib/python2.7/site-packages/django/core/management/init.py", line 353, in execute_from_command_line
  utility.execute()
  File "/venv/local/lib/python2.7/site-packages/django/core/management/init.py", line 345, in execute
  self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/venv/local/lib/python2.7/site-packages/django/core/management/init.py", line 195, in fetch_command
  klass = load_command_class(app_name, subcommand)
  File "/venv/local/lib/python2.7/site-packages/django/core/management/init.py", line 39, in load_command_class
  module = import_module('%s.management.commands.%s' % (app_name, name))
  File "/usr/lib/python2.7/importlib/init.py", line 37, in import_module
  import(name)
  File "/venv/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 16, in
  from django.db.migrations.autodetector import MigrationAutodetector
  File "/venv/local/lib/python2.7/site-packages/django/db/migrations/autodetector.py", line 14, in
  from django.db.migrations.questioner import MigrationQuestioner
  File "/venv/local/lib/python2.7/site-packages/django/db/migrations/questioner.py", line 12, in
  from .loader import MigrationLoader
  File "/venv/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 10, in
  from django.db.migrations.recorder import MigrationRecorder
  File "/venv/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 12, in
  class MigrationRecorder(object):
  File "/venv/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 26, in MigrationRecorder
  class Migration(models.Model):
  File "/venv/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 27, in Migration
  app = models.CharField(max_length=255)
  File "/venv/local/lib/python2.7/site-packages/django/db/models/fields/init.py", line 1072, in init
  super(CharField, self).init(*args, **kwargs)
  File "/venv/local/lib/python2.7/site-packages/django/db/models/fields/init.py", line 166, in init
  self.db_tablespace = db_tablespace or settings.DEFAULT_INDEX_TABLESPACE
  File "/venv/local/lib/python2.7/site-packages/django/conf/init.py", line 55, in getattr
  self._setup(name)
  File "/venv/local/lib/python2.7/site-packages/django/conf/init.py", line 43, in _setup
  self._wrapped = Settings(settings_module)
  File "/venv/local/lib/python2.7/site-packages/django/conf/init.py", line 120, in init
  raise ImproperlyConfigured("The SECRET_KEY setting must not be empty.")
  django.core.exceptions.ImproperlyConfigured: The SECRET_KEY setting must not be empty.