从Django静态文件夹获取图像的正确方法

在my setting.py中,我有下一个代码:

STATICFILES_FINDERS = [
    'django.contrib.staticfiles.finders.FileSystemFinder',
    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
]

STATICFILES_DIRS = [
    os.path.join(PROJECT_DIR, 'static'),
]

STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.ManifestStaticFilesStorage'

STATIC_ROOT = os.path.join(BASE_DIR, 'static')
STATIC_URL = '/static/'

MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
MEDIA_URL = '/media/'

在views.py中,我希望获得静态文件夹中的一些图像,如下所示:

for f in ["static/img/logo/contact-form/logo_black.png", "static/img/logo/contact-form/logo_white.png":
    fp = open(os.path.join(BASE_DIR, f), 'rb')
    msg_img = MIMEImage(fp.read())
    fp.close()
    msg_img.add_header('Content-ID', '<{}>'.format(f))
    msg.attach(msg_img)

但我有一个错误:

"[Errno 2] No such file or directory: '/Users/Admin/Projects/web-dealers/webDealers/static/img/logo/contact-form/logo-black.png'"

更新

urlpatterns = [
    url(r'^django-admin/', admin.site.urls),

    url(r'^admin/', include(wagtailadmin_urls)),
    url(r'^documents/', include(wagtaildocs_urls)),

    url(r'^search/$', search_views.search, name='search'),
    url(r'^api/', include('API.urls')),
    url(r'^contact-us/', contact_us, name="contact_us"),

    # Languages
    url(r'^i18n/', include('django.conf.urls.i18n'), name='set_language'),
    url(r'^jsi18n/$', JavaScriptCatalog.as_view(), name='javascript-catalog'),

    # For anything not caught by a more specific rule above, hand over to
    # Wagtail's page serving mechanism. This should be the last pattern in
    # the list:
    url(r'', include(wagtail_urls)),
] + static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)

我做错了什么?