Django DEBUG = False 引起的问题

把settings.py中的DEBUG设置为False前端页面显示不正常了
DEBUG = False TEMPLATE_DEBUG = False ALLOWED_HOSTS = ['*']
错误信息

但开启后就能正常显示了，这是什么原因引起的？

settings.py代码

import os
BASE_DIR = os.path.dirname(os.path.dirname(__file__))

SECRET_KEY = 'd+eb61(a0&cu&)0dmok#g9kl1&!+*e*jo5v#(t5#do68%ncdow'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = False

TEMPLATE_DEBUG = False

ALLOWED_HOSTS = ['*']


# Application definition

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'blog',
    'south',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
)

ROOT_URLCONF = 'mysite.urls'

WSGI_APPLICATION = 'mysite.wsgi.application'


# Database
# https://docs.djangoproject.com/en/1.6/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'mysite',
        'USER': 'mysite',
        'PASSWORD': '123456',
        'HOST': '127.0.0.1',
        'PORT': '3306',
    }
}

# Internationalization
# https://docs.djangoproject.com/en/1.6/topics/i18n/

LANGUAGE_CODE = 'zh-cn'

TIME_ZONE = 'Asia/Shanghai'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.6/howto/static-files/

STATIC_URL = '/static/'
STATICFILES_DIRS = (
        os.path.join(BASE_DIR, 'static'),
)
TEMPLATE_DIRS = (
        os.path.join(BASE_DIR, 'templates'),
)