在save（self，* args，** kwargs）中获取错误：在继承自（models.Model）的“Account”类模型中

Question

以下是类模型，我尝试了the source code但是再次收到错误我需要解释问题save()方法

from django.conf import settings
from django.core.mail import send_mail
from django.db import models
from django.template.loader import render_to_string
from django.utils import timezone

from cms.models import CMSPlugin
# Create your models here.

class Account(models.Model):

#
# Note: Everything in this section should be optional, fields are to be
# made Required in the Forms.
#

email = models.EmailField(u'Email',
    blank=True,
    default='',
    error_message={'invalid': 'Please enter a correctly formatted email address.'},
    help_text=u'Your email address',
    max_length=255,
)
password = models.CharField(u'Password',
    blank=True,
    default='',
    error_message={'invalid': 'Please enter your password correctly.'},
    help_text=u'Your password more than 6 character',
    max_length=255,
)
# Meta, non-form data
created_date = models.DateTimeField(u'created date',
    blank=True,
    default=timezone.now,
    help_text=u'When this person completed the account creation.',
)
was_created = models.BooleanField(u'has been created?',
    default=False,
    help_text=u'Check this if someone has already reached out to this person.',
)
notes = models.TextField(u'Account notes',
    blank=True,
    default='',
    help_text=u'Internal notes relating to account this person.',
)

referer = models.CharField(u'referring page',
    blank=True,
    default='',
    help_text=u'This is the page the visitor was on before coming to the creating page.'
)

def send_notification_email(self):
    """
    Sends a notification email to the list of recipients defined in
    settings.NOTIFICATIONS informing them that a new account has arrived.

    SERVER_EMAIL is defined in settings and account the "from"
    address for email sent from the webserver.

    MANAGERS needs to be defined in settings and should be a list
    containing the email addresses of those that should receive
    notification of an incoming account.
    """
    # Using a template is probably overkill for this but...
    email_subject = render_to_string('account/notification-subject.txt', {
        'account': self,
    })

    email_body = render_to_string('account/notification-body.txt', {
        'account': self,
    })

    try:
        send_email(
            email_subject,
            email_body,
            settings.SERVER_EMAIL,
            settings.MANAGERS,
            fail_silently=(not settings.DEBUG)
        )
    except Exception:
        # If NOT in DEBUG (development) mode, we silently ignore any
        # exceptions to avoid interrupting capture of the submitter'settings
        # details. If in DEBUG mode, then raise the error so we can 
        # troubleshoot.
        if (settings.DEBUG):
            raise

def save(self, *args, **kwargs):

    if not self.pk:
        #
        # If using something like Celery, then this should be scheduled, not
        # executed in the request/response cycle.
        #
        try:
            self.send_notification_email()
        except:
            #
            # This is just a precaution, should there be an issue with the
            # emailing, we do not want this to prevent the new Account
            # object from being saved.
            #
            pass

    super(Account, self).save(*args, **kwargs)
    #models.Model.save(self, *args, **kwargs)

def __unicode__(self):
    return '%s (%s)' % (self.email, str(self.created_date), )

class AccountPluginModel(CMSPlugin):
    title = models.CharField(u'title',
        blank=True,
        help_text=u'Optional, Title of the widget.',
        max_length=64,
    )

错误显示在终端：

  File "/home/tarek/Documents/python/teknikcloud-cms/account/models.py", line 91
    def save(self, *args, **kwargs):
                                   ^
IndentationError: unindent does not match any outer indentation level

我需要解释覆盖save（）方法