Calculating geometry using pyscripting: failed to read polygon input feature

GoldenJiang

I'm following an ESRI online learning tutorial: Creating Python Toolboxes Using ArcGIS 10.1.

I copy the script and test on my data but the new tool only recognises 'Street' as an input feature. 

Can anyone tell me where is wrong with the codes below? 

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

<SPAN class="keyword token">class</SPAN> <SPAN class="token class-name">Toolbox</SPAN><SPAN class="punctuation token">(</SPAN>object<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
 <SPAN class="keyword token">def</SPAN> <SPAN class="token function">__init__</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
 <SPAN class="string token">"""Define the toolbox (the name of the toolbox is the name of the
 .pyt file)."""</SPAN>
 self<SPAN class="punctuation token">.</SPAN>label <SPAN class="operator token">=</SPAN> <SPAN class="string token">"Calculate Geometry"</SPAN>
 self<SPAN class="punctuation token">.</SPAN>alias <SPAN class="operator token">=</SPAN> <SPAN class="string token">"geometry"</SPAN>
<SPAN class="comment token"># List of tool classes associated with this toolbox</SPAN>
 self<SPAN class="punctuation token">.</SPAN>tools <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>CalculateGeometry<SPAN class="punctuation token">]</SPAN>

<SPAN class="keyword token">class</SPAN> <SPAN class="token class-name">CalculateGeometry</SPAN><SPAN class="punctuation token">(</SPAN>object<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
 <SPAN class="keyword token">def</SPAN> <SPAN class="token function">__init__</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
 <SPAN class="string token">"""Define the tool (tool name is the name of the class)."""</SPAN>
 self<SPAN class="punctuation token">.</SPAN>label <SPAN class="operator token">=</SPAN> <SPAN class="string token">"CalculateGeometry"</SPAN>
 self<SPAN class="punctuation token">.</SPAN>description <SPAN class="operator token">=</SPAN> <SPAN class="string token">""</SPAN>
 self<SPAN class="punctuation token">.</SPAN>canRunInBackground <SPAN class="operator token">=</SPAN> <SPAN class="token boolean">True</SPAN>
<SPAN class="keyword token">def</SPAN> <SPAN class="token function">getParameterInfo</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
<SPAN class="comment token"># first parameter</SPAN>
 <SPAN class="string token">"""Define parameter definitions"""</SPAN>
 in_features <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Parameter<SPAN class="punctuation token">(</SPAN>
 displayName <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Input Feature'</SPAN><SPAN class="punctuation token">,</SPAN>
 name <SPAN class="operator token">=</SPAN> <SPAN class="string token">'in_features'</SPAN><SPAN class="punctuation token">,</SPAN>
 datatype <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Feature Layer'</SPAN><SPAN class="punctuation token">,</SPAN>
 parameterType <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Required'</SPAN><SPAN class="punctuation token">,</SPAN>
 direction <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Input'</SPAN><SPAN class="punctuation token">)</SPAN>
 in_features<SPAN class="punctuation token">.</SPAN>filter<SPAN class="punctuation token">.</SPAN>list <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Point'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Polyline'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Polygon'</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="comment token"># second parameter</SPAN>
 field <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Parameter<SPAN class="punctuation token">(</SPAN>
 displayName <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Field name'</SPAN><SPAN class="punctuation token">,</SPAN>
 name <SPAN class="operator token">=</SPAN> <SPAN class="string token">'field_name'</SPAN><SPAN class="punctuation token">,</SPAN>
 datatype <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Field'</SPAN><SPAN class="punctuation token">,</SPAN>
 parameterType <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Required'</SPAN><SPAN class="punctuation token">,</SPAN>
 direction <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Input'</SPAN><SPAN class="punctuation token">)</SPAN>
field<SPAN class="punctuation token">.</SPAN>parameterDependencies <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>in_features<SPAN class="punctuation token">.</SPAN>name<SPAN class="punctuation token">]</SPAN>
 <SPAN class="comment token"># only show field belongs to the input feature</SPAN>
 in_features<SPAN class="punctuation token">.</SPAN>filter<SPAN class="punctuation token">.</SPAN>list <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Short'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Long'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Double'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Float'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Text'</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="comment token"># third parameter</SPAN>
 geomProperty <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Parameter<SPAN class="punctuation token">(</SPAN>
 displayName <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Property'</SPAN><SPAN class="punctuation token">,</SPAN>
 name <SPAN class="operator token">=</SPAN> <SPAN class="string token">'geomProperty'</SPAN><SPAN class="punctuation token">,</SPAN>
 datatype <SPAN class="operator token">=</SPAN> <SPAN class="string token">'String'</SPAN><SPAN class="punctuation token">,</SPAN>
 parameterType <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Required'</SPAN><SPAN class="punctuation token">,</SPAN>
 direction <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Input'</SPAN><SPAN class="punctuation token">)</SPAN>
<SPAN class="comment token"># fourth parameter</SPAN>
 units <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Parameter<SPAN class="punctuation token">(</SPAN>
 displayName <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Units'</SPAN><SPAN class="punctuation token">,</SPAN>
 name <SPAN class="operator token">=</SPAN> <SPAN class="string token">'units'</SPAN><SPAN class="punctuation token">,</SPAN>
 datatype <SPAN class="operator token">=</SPAN> <SPAN class="string token">'String'</SPAN><SPAN class="punctuation token">,</SPAN>
 parameterType <SPAN class="operator token">=</SPAN> <SPAN class="string token">'optional'</SPAN><SPAN class="punctuation token">,</SPAN>
 direction <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Input'</SPAN><SPAN class="punctuation token">,</SPAN>
 enabled <SPAN class="operator token">=</SPAN> <SPAN class="token boolean">False</SPAN><SPAN class="punctuation token">)</SPAN>
<SPAN class="comment token"># fifth parameter</SPAN>
 out_features <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Parameter<SPAN class="punctuation token">(</SPAN>
 displayName <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Output Features'</SPAN><SPAN class="punctuation token">,</SPAN>
 name <SPAN class="operator token">=</SPAN> <SPAN class="string token">'out_features'</SPAN><SPAN class="punctuation token">,</SPAN>
 datatype <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Feature Layer'</SPAN><SPAN class="punctuation token">,</SPAN>
 parameterType <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Derived'</SPAN><SPAN class="punctuation token">,</SPAN>
 direction <SPAN class="operator token">=</SPAN> <SPAN class="string token">'Output'</SPAN><SPAN class="punctuation token">)</SPAN>
field<SPAN class="punctuation token">.</SPAN>parameterDependencies <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>in_features<SPAN class="punctuation token">.</SPAN>name<SPAN class="punctuation token">]</SPAN>
 out_features<SPAN class="punctuation token">.</SPAN>schema<SPAN class="punctuation token">.</SPAN>clone <SPAN class="operator token">=</SPAN> <SPAN class="token boolean">True</SPAN>
params <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>in_features<SPAN class="punctuation token">,</SPAN> field<SPAN class="punctuation token">,</SPAN> geomProperty<SPAN class="punctuation token">,</SPAN> units<SPAN class="punctuation token">,</SPAN> out_features<SPAN class="punctuation token">]</SPAN>
 <SPAN class="keyword token">return</SPAN> params

 <SPAN class="keyword token">def</SPAN> <SPAN class="token function">isLicensed</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
 <SPAN class="string token">"""Set whether tool is licensed to execute."""</SPAN>
 <SPAN class="keyword token">return</SPAN> <SPAN class="token boolean">True</SPAN>
<SPAN class="keyword token">def</SPAN> <SPAN class="token function">updateParameters</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">,</SPAN> parameters<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
 <SPAN class="string token">"""Modify the values and properties of parameters before internal
 validation is performed. This method is called whenever a parameter
 has been changed."""</SPAN>
<SPAN class="comment token"># Get Inputs</SPAN>
 in_features <SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>
 geomProperty <SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">]</SPAN>
 units <SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="comment token"># Geometry Property Filter Lists</SPAN>
 pointPropertyList <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'X Coordinate of Point'</SPAN><SPAN class="punctuation token">,</SPAN>
 <SPAN class="string token">'Y Coordinate of Point'</SPAN><SPAN class="punctuation token">]</SPAN>
 linePropertyList <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Length'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'X Coordinate of Line Start'</SPAN><SPAN class="punctuation token">,</SPAN>
 <SPAN class="string token">'Y Coordinate of Line Start'</SPAN><SPAN class="punctuation token">,</SPAN>
 <SPAN class="string token">'X Coordinate of Line End'</SPAN><SPAN class="punctuation token">,</SPAN>
 <SPAN class="string token">'Y Coordinate of Line End'</SPAN><SPAN class="punctuation token">]</SPAN>
 polygonPropertyList <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Area'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Perimeter'</SPAN><SPAN class="punctuation token">,</SPAN>
 <SPAN class="string token">'X Coordinate of Centroid'</SPAN><SPAN class="punctuation token">,</SPAN>
 <SPAN class="string token">'Y Coordinate of Centroid'</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="comment token"># Get shape type of input to determine</SPAN>
 <SPAN class="comment token"># filter list for geometry property parameter</SPAN>
<SPAN class="keyword token">if</SPAN> in_features<SPAN class="punctuation token">.</SPAN>value<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; desc <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>in_features<SPAN class="punctuation token">.</SPAN>valueAsText<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> desc<SPAN class="punctuation token">.</SPAN>shapeType <SPAN class="operator token">==</SPAN> <SPAN class="string token">'Point'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; geomProperty<SPAN class="punctuation token">.</SPAN>filter<SPAN class="punctuation token">.</SPAN>list <SPAN class="operator token">=</SPAN> pointPropertyList
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> desc<SPAN class="punctuation token">.</SPAN>shapeType <SPAN class="operator token">==</SPAN> <SPAN class="string token">'Polyline'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; geomProperty<SPAN class="punctuation token">.</SPAN>filter<SPAN class="punctuation token">.</SPAN>list <SPAN class="operator token">=</SPAN> linePropertyList
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> desc<SPAN class="punctuation token">.</SPAN>shapeType <SPAN class="operator token">==</SPAN> <SPAN class="string token">'Polygon'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; geomProperty<SPAN class="punctuation token">.</SPAN>filter<SPAN class="punctuation token">.</SPAN>list <SPAN class="operator token">=</SPAN> polygonPropertyList
<SPAN class="comment token"># Unit Filter Lists</SPAN>
 areaUnitList <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Acres'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Ares'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Hectares'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Square Centimeters'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Square Inches'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Square Feet'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Square Kilometers'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Square Meters'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Square Miles'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Square Millimeters'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Square Yard'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Square Decimeters'</SPAN><SPAN class="punctuation token">]</SPAN>
 lengthUnitList <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Centimeters'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Feet'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Inches'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Kilometers'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Meters'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Miles'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Millimeters'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Nautical Miles'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Yards'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Decimal Degrees'</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="comment token"># Get geometry property input to determine filter list for unit parameter</SPAN>
 <SPAN class="keyword token">if</SPAN> geomProperty<SPAN class="punctuation token">.</SPAN>value<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> geomProperty<SPAN class="punctuation token">.</SPAN>valueAsText <SPAN class="operator token">==</SPAN> <SPAN class="string token">'Area'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units<SPAN class="punctuation token">.</SPAN>enabled <SPAN class="operator token">=</SPAN> <SPAN class="token boolean">True</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units<SPAN class="punctuation token">.</SPAN>filter<SPAN class="punctuation token">.</SPAN>list <SPAN class="operator token">=</SPAN> areaUnitList
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> geomProperty<SPAN class="punctuation token">.</SPAN>valueAsText <SPAN class="keyword token">in</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Length'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Perimeter'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units<SPAN class="punctuation token">.</SPAN>enabled <SPAN class="operator token">=</SPAN><SPAN class="token boolean">True</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units<SPAN class="punctuation token">.</SPAN>filter<SPAN class="punctuation token">.</SPAN>list <SPAN class="operator token">=</SPAN> lengthUnitList
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units<SPAN class="punctuation token">.</SPAN>value <SPAN class="operator token">=</SPAN> <SPAN class="string token">''</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units<SPAN class="punctuation token">.</SPAN>filter<SPAN class="punctuation token">.</SPAN>list <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units<SPAN class="punctuation token">.</SPAN>enabled <SPAN class="operator token">=</SPAN> <SPAN class="token boolean">False</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN>

 <SPAN class="keyword token">def</SPAN> <SPAN class="token function">updateMessages</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">,</SPAN> parameters<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
 <SPAN class="string token">"""Modify the messages created by internal validation for each tool
 parameter. This method is called after internal validation."""</SPAN>
in_features <SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>
 geomProperty<SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">]</SPAN>
 units <SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="comment token"># Check is input is Multipoint or Multipatch and if so set an error</SPAN>
 <SPAN class="keyword token">if</SPAN> in_features<SPAN class="punctuation token">.</SPAN>value<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; desc <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>in_features<SPAN class="punctuation token">.</SPAN>valueAsText<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> desc<SPAN class="punctuation token">.</SPAN>shapeType <SPAN class="keyword token">in</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Multipoint'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Multipatch'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; in_features<SPAN class="punctuation token">.</SPAN>setErrorMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'{0} features are not supported.'</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>desc<SPAN class="punctuation token">.</SPAN>shapeType<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
<SPAN class="comment token"># Check if certain geometry property value is set with no units and add error</SPAN>
 <SPAN class="keyword token">if</SPAN> geomProperty<SPAN class="punctuation token">.</SPAN>valueAsText <SPAN class="keyword token">in</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Length'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Perimeter'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Area'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> <SPAN class="operator token">not</SPAN> units<SPAN class="punctuation token">.</SPAN>value<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; units<SPAN class="punctuation token">.</SPAN>setErrorMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'Units required for {0} property'</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>geomProperty<SPAN class="punctuation token">.</SPAN>valueAsText<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
 <SPAN class="keyword token">return</SPAN>

 <SPAN class="keyword token">def</SPAN> <SPAN class="token function">execute</SPAN><SPAN class="punctuation token">(</SPAN>self<SPAN class="punctuation token">,</SPAN> parameters<SPAN class="punctuation token">,</SPAN> messages<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
 <SPAN class="string token">"""The source code of the tool."""</SPAN>
 <SPAN class="comment token"># Get Input</SPAN>
 in_features <SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>valueAsText
 field <SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>valueAsText
 geomProperty<SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>valueAsText
 units <SPAN class="operator token">=</SPAN> parameters<SPAN class="punctuation token">[</SPAN><SPAN class="number token">3</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>valueAsText
shapeFieldName <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>in_features<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>shapeFieldName
<SPAN class="comment token"># Create the expression</SPAN>
 exp <SPAN class="operator token">=</SPAN> <SPAN class="string token">'!'</SPAN> <SPAN class="operator token">+</SPAN> shapeFieldName
 <SPAN class="keyword token">if</SPAN> geomProperty <SPAN class="operator token">==</SPAN> <SPAN class="string token">'Area'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; exp <SPAN class="operator token">+=</SPAN> <SPAN class="string token">'.area@'</SPAN><SPAN class="operator token">+</SPAN> units<SPAN class="punctuation token">.</SPAN>replace<SPAN class="punctuation token">(</SPAN><SPAN class="string token">''</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">''</SPAN><SPAN class="punctuation token">)</SPAN>
 <SPAN class="keyword token">elif</SPAN> geomProperty <SPAN class="keyword token">in</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Length'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Perimeter'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; exp <SPAN class="operator token">+=</SPAN> <SPAN class="string token">'.length@'</SPAN><SPAN class="operator token">+</SPAN> units<SPAN class="punctuation token">.</SPAN>replace<SPAN class="punctuation token">(</SPAN><SPAN class="string token">''</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">''</SPAN><SPAN class="punctuation token">)</SPAN>
 <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; propertyList <SPAN class="operator token">=</SPAN> geomProperty<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN><SPAN class="string token">''</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; coord <SPAN class="operator token">=</SPAN> propertyList<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> propertyList<SPAN class="punctuation token">[</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="keyword token">in</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Point'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Start'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exp <SPAN class="operator token">+=</SPAN> <SPAN class="string token">'.firstPoint.'</SPAN> <SPAN class="operator token">+</SPAN> coord
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> propertyList<SPAN class="punctuation token">[</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">==</SPAN> <SPAN class="string token">'End'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exp <SPAN class="operator token">+=</SPAN> <SPAN class="string token">'.lastPoint.'</SPAN><SPAN class="operator token">+</SPAN> coord
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">elif</SPAN> propertyList<SPAN class="punctuation token">[</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN> <SPAN class="operator token">==</SPAN> <SPAN class="string token">'Centroid'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exp <SPAN class="operator token">+=</SPAN> <SPAN class="string token">'.centroid.'</SPAN><SPAN class="operator token">+</SPAN> coord
exp<SPAN class="operator token">+=</SPAN> <SPAN class="string token">'!'</SPAN>

messages<SPAN class="punctuation token">.</SPAN>addMessage<SPAN class="punctuation token">(</SPAN>
 <SPAN class="string token">'\nExpression used for field calculation: {0}\n'</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>exp<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>

<SPAN class="comment token">#Calculate Field</SPAN>
 arcpy<SPAN class="punctuation token">.</SPAN>CalculateField_management<SPAN class="punctuation token">(</SPAN>in_features<SPAN class="punctuation token">,</SPAN>field<SPAN class="punctuation token">,</SPAN>exp<SPAN class="punctuation token">,</SPAN><SPAN class="string token">'PYTHON_9.3'</SPAN><SPAN class="punctuation token">)</SPAN>
<SPAN class="keyword token">return</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

calculate geometry.pyt.xml.zip

RandyBurton

I reposted my code above as I also had some indentation errors.  Lines 19-27 limit the type of feature layers the tool will use - points, lines and polygons.  For some reason the filter on line 27 is limiting the feature type to lines.  If you comment the line out, it will then allow points and polygons.  

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token"># in_features.filter.list = ['Point','Polyline','Polygon']</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

But this may cause the code to fail later on.  In the training seminar video, POINT etc. is in all caps, but it doesn't seem to be a problem with capitalization alone.  This will take some further investigation.

Regarding Micah's question about line 37:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; in_features<SPAN class="punctuation token">.</SPAN>filter<SPAN class="punctuation token">.</SPAN>list <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'Short'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Long'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Double'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Float'</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">'Text'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

This line is limiting the choice display of the selected layer's fields to the specific types in the list.  Fields of type Date, Blob, Raster, Guid, etc. are not displayed.