title: Pandas isin equivalent for float or int
body: <p>I have a dataframe with column A populated with numbers 1-9. I want to filter just on numbers 2 and 3. isin does not work for float dtypes. Is there an alternative?</p>
  <p>something similar to:</p>
  <pre><code>df=df.loc[df['ColA'].isin([2,3])]
  </code></pre>