TypeError: first argument must be an iterable of pandas objects, you passed an object of type "DataFrame" : <p>I have a big dataframe and I try to split that and after <code>concat</code> that.
I use</p>

<pre><code>df2 = pd.read_csv('et_users.csv', header=None, names=names2, chunksize=100000)
for chunk in df2:
    chunk['ID'] = chunk.ID.map(rep.set_index('member_id')['panel_mm_id'])

df2 = pd.concat(chunk, ignore_index=True)
</code></pre>

<p>But it return an error</p>

<pre><code>TypeError: first argument must be an iterable of pandas objects, you passed an object of type "DataFrame"
</code></pre>

<p>How can I fix that?</p>
