Not Able to Add FC from GDB Dataset to an MXD using ArcPy Stand Alone Script

BruceGreen

I am trying to add a Feature Class from a Geodatabase Dataset to an MXD and save a copy like this but I am getting following errors on each methos

<SPAN class="keyword token">import</SPAN> arcpy
<SPAN class="keyword token">import</SPAN> os

arcpy<SPAN class="punctuation token">.</SPAN>env<SPAN class="punctuation token">.</SPAN>workspace <SPAN class="operator token">=</SPAN> r<SPAN class="string token">"C:\arcgis\ArcTutor\AAA\MXDs"</SPAN>
MXD <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>mapping<SPAN class="punctuation token">.</SPAN>MapDocument<SPAN class="punctuation token">(</SPAN>r<SPAN class="string token">"C:\arcgis\ArcTutor\AAA\MXDs\map.mxd"</SPAN><SPAN class="punctuation token">)</SPAN>
DF <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>mapping<SPAN class="punctuation token">.</SPAN>ListDataFrames<SPAN class="punctuation token">(</SPAN>MXD<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>

lyr <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>mapping<SPAN class="punctuation token">.</SPAN>Layer<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"C:\arcgis\ArcTutor\AAA\GDBs\Delaware.gdb\Kent\Kent"</SPAN><SPAN class="punctuation token">)</SPAN>
arcpy<SPAN class="punctuation token">.</SPAN>mapping<SPAN class="punctuation token">.</SPAN>AddLayer<SPAN class="punctuation token">(</SPAN>DF<SPAN class="punctuation token">,</SPAN> layer<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"AUTO_ARRANGE"</SPAN><SPAN class="punctuation token">)</SPAN>
MXD<SPAN class="punctuation token">.</SPAN>saveACopy<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'newmxd.mxd'</SPAN><SPAN class="punctuation token">)</SPAN>
<SPAN class="keyword token">del</SPAN> MXD
<SPAN class="keyword token">print</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">" Done"</SPAN><SPAN class="punctuation token">)</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍