Pandas: increment datetime
<p>I need to do some actions with <code>date</code> in df column</p>

<pre><code>buys['date_min'] = (buys['date'] - MonthDelta(1))
buys['date_min'] = (buys['date'] + timedelta(days=5))
</code></pre>

<p>But it return </p>

<blockquote>
  <p>TypeError: incompatible type [object] for a datetime/timedelta operation</p>
</blockquote>

<p>How can I do it to column?</p>