title: Why isn't keyword DateField.input_formats recognized in django 1.0.2 and Python 2.5?
body: <p>With django 1.0.2 and Python 2.5, when I use the keyword <code>DateField.input_formats</code>, I get the error that <code>__init__()</code> got an unexpected keyword argument <code>'input_formats'</code>. When I look in the <code>__init__</code> file, I don't see <code>input_formats</code> as one of the acceptable keyword arguments.</p>
  
  <p>I thought that <code>input_formats</code> had been around long enough that it should be in there. Is the <code>input_formats</code> keyword not supported in this configuration? If not, how can I acquire an updated <code>__init__</code> that does support it? Thank you.</p>
  
  <p>As suggested in the comment, I have added code below. I suspect the problem is that I am confusing the <code>DateField</code> form and <code>DateField</code> model, but I would be pleased if someone could confirm that.</p>
  
  <pre><code>from django.db import models
  
  class Payment(models.Model):
      date_paid = models.DateField(blank=True, db_index=True, input_formats=['%m/%d/%y'])
  </code></pre>