(Written in Python shell)

    &gt;&gt;&gt; o = object()
    &gt;&gt;&gt; o.test = 1
    
    Traceback (most recent call last):
      File &quot;&lt;pyshell#45&gt;&quot;, line 1, in &lt;module&gt;
        o.test = 1
    AttributeError: &#39;object&#39; object has no attribute &#39;test&#39;
    &gt;&gt;&gt; class test1:
    	pass
    
    &gt;&gt;&gt; t = test1()
    &gt;&gt;&gt; t.test
    
    Traceback (most recent call last):
      File &quot;&lt;pyshell#50&gt;&quot;, line 1, in &lt;module&gt;
        t.test
    AttributeError: test1 instance has no attribute &#39;test&#39;
    &gt;&gt;&gt; t.test = 1
    &gt;&gt;&gt; t.test
    1
    &gt;&gt;&gt; class test2(object):
    	pass
    
    &gt;&gt;&gt; t = test2()
    &gt;&gt;&gt; t.test = 1
    &gt;&gt;&gt; t.test
    1
    &gt;&gt;&gt; 

Why doesn&#39;t object allow you to add attributes to it?

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Why can't you add attributes to object in python?