为什么我在运行python manage.py syncdb时收到错误（IndentationError: unexpected indent）

Question

from django.db import models


class Post(models.Model):
    title = models.CharField(max_length=100)
    content = models.CharField(max_length=1000)
    created = models.DateField()
    modified = models.DateField()

在使用 python manage.py syncdb 的时候出现了错误：

Traceback (most recent call last):
  File "manage.py", line 14, in <module>
    execute_manager(settings)
  File "/usr/local/lib/python2.6/dist-packages/django/core/management/__init__.py", line 438, in execute_manager
    utility.execute()
  File "/usr/local/lib/python2.6/dist-packages/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.6/dist-packages/django/core/management/base.py", line 191, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.6/dist-packages/django/core/management/base.py", line 219, in execute
    self.validate()
  File "/usr/local/lib/python2.6/dist-packages/django/core/management/base.py", line 249, in validate
    num_errors = get_validation_errors(s, app)
  File "/usr/local/lib/python2.6/dist-packages/django/core/management/validation.py", line 35, in get_validation_errors
    for (app_name, error) in get_app_errors().items():
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/loading.py", line 146, in get_app_errors
    self._populate()
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/loading.py", line 61, in _populate
    self.load_app(app_name, True)
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/loading.py", line 78, in load_app
    models = import_module('.models', app_name)
  File "/usr/local/lib/python2.6/dist-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/home/user1/djangoblog/../djangoblog/blog/models.py", line 7
    created = models.DateField()
    ^
IndentationError: unexpected indent

Answer 1

你可能在需要制表符或空格的地方用了空格或制表符。

Answer 2

我注意到你发的代码片段用了制表符（tab）。试试用空格来缩进同样的代码。

Answer 3

你在文件里混用了制表符和空格吗？这通常是导致这种错误的最常见原因。