python - 用pycharm启动django报错。

我用pycharm2016.1启动django项目会报错，如下：

Traceback (most recent call last):
File "C:/Users/wenqiang/Desktop/pyjh_xueqi_0803/manage.py", line 27, in

execute_from_command_line(sys.argv)

File "C:Python27libsite-packagesdjangocoremanagement__init__.py", line 399, in execute_from_command_line

utility.execute()

File "C:Python27libsite-packagesdjangocoremanagement__init__.py", line 392, in execute

self.fetch_command(subcommand).run_from_argv(self.argv)

File "C:Python27libsite-packagesdjangocoremanagementbase.py", line 242, in run_from_argv

self.execute(*args, **options.__dict__)

File "C:Python27libsite-packagesdjangocoremanagementbase.py", line 279, in execute

saved_locale = translation.get_language()

File "C:Python27libsite-packagesdjangoutilstranslation__init__.py", line 154, in get_language

return _trans.get_language()

File "C:Python27libsite-packagesdjangoutilstranslation__init__.py", line 52, in getattr

if settings.USE_I18N:

File "C:Python27libsite-packagesdjangoconf__init__.py", line 54, in getattr

self._setup(name)

File "C:Python27libsite-packagesdjangoconf__init__.py", line 47, in _setup

% (desc, ENVIRONMENT_VARIABLE))

django.core.exceptions.ImproperlyConfigured: Requested setting USE_I18N, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.
Process finished with exit code 1

但是在该文件下用命令行启动就没问题：

求解