ImportError: Module "django.middleware.csrf" does not define a " CsrfViewMiddle

 i also meet the same error;
finally, i found there are some wrong blacks in my file,just like this:
MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    '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',
]
delete the redundant blanks,it works.