title: AttributeError: 'Image' object has no attribute 'save'
body: <p>I am following the basic tutorial for RDKit.</p>
  <pre><code>p = Chem.MolFromSmiles('[nH]1cnc2cncnc21')
  subms = [x for x in ms if x.HasSubstructMatch(p)]
  len(subms)
  
  AllChem.Compute2DCoords(p)
  
  for m in subms: AllChem.GenerateDepictionMatching2DStructure(m,p)
      img=Draw.MolsToGridImage(subms,molsPerRow=4,subImgSize=(200,200),legends=[x.GetProp(&quot;_Name&quot;) for x in subms])    
      img.save('images/cdk2_molgrid.aligned.o.png')    
  </code></pre>
  <p>My version looks like this:</p>
  <pre><code>NP=pd.read_excel(r'C:\Users\BajMic\NPPics.xlsx', header=0, index_col=False, keep_default_na=True)
  NP['mol']=NP.smiles.apply(getMol)
  
  ms= [i for i in NP['mol'] if i is not None]
  img=Draw.MolsToGridImage(ms, molsPerRow=10)
  img.save('Pic.png')
  </code></pre>
  <p>In both cases, the tutorial and my own code, I get the same error:
  AttributeError: 'Image' object has no attribute 'save'</p>
  <p>Now, this is confusing, because I was just following a simple tutorial. I looked at other similar topic, but I think my case is much more trivial. What am I missing here?</p>
  <p>Tutorial: <a href="https://www.rdkit.org/docs/GettingStartedInPython.html" rel="nofollow noreferrer">https://www.rdkit.org/docs/GettingStartedInPython.html</a></p>