using arcpy.da.walk to inventory data and export metadata to csv

ShannonGroff

0down votefavorite

I'm a novice when it comes to arcpy and am trying to develop a script that will use arcpy.da.walk to inventory our GIS data. As it goes through the folders/gdbs of data that we have, I want it to export a few items to a csv for each feature class (for now I'd be happy with feature class path, filename, spatial reference name and metadata purpose). I've gotten the script to work up until the metadata purpose part. Once I add the lines: arcpy<SPAN class="punctuation token">.</SPAN>ExportMetadata_conversion<SPAN class="punctuation token">(</SPAN>feature_class<SPAN class="punctuation token">,</SPAN> translatorpath<SPAN class="punctuation token">,</SPAN> xmlfile<SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp; tree <SPAN class="operator token">=</SPAN> ElementTree<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp; tree<SPAN class="punctuation token">.</SPAN>parse<SPAN class="punctuation token">(</SPAN>xmlfile<SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp;&nbsp; spot <SPAN class="operator token">=</SPAN> tree<SPAN class="punctuation token">.</SPAN>find<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"idinfo/descript/purpose"</SPAN><SPAN class="punctuation token">)</SPAN>‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN> my script does not return anything. Without those lines, I recieve a csv file with feature class path, filename, and spatial reference name, but if I include the lines my csv file is empty. No errors, just empty. My script (included below) is based off of: https://arcpy.wordpress.com/tag/os-walk/ and http://gis.stackexchange.com/questions/34729/creating-table-containing-all-filenames-and-possibly-metadata-in-file-geodatab/34797#3479/. Any help is greatly appreciated! EDITED: Some feature classes may not have a spatial reference defined, and many feature classes may not have any metadata associated. I still want these in the csv, but those fields can either be blank or say something along the lines of "No spatial reference defined" and "No metadata purpose defined". <SPAN class="keyword token">import</SPAN> os <SPAN class="keyword token">import</SPAN> arcpy <SPAN class="keyword token">import</SPAN> csv <SPAN class="keyword token">from</SPAN> xml<SPAN class="punctuation token">.</SPAN>etree<SPAN class="punctuation token">.</SPAN>ElementTree <SPAN class="keyword token">import</SPAN> ElementTree <SPAN class="keyword token">from</SPAN> arcpy <SPAN class="keyword token">import</SPAN> env <SPAN class="keyword token">def</SPAN> <SPAN class="token function">inventory_data</SPAN><SPAN class="punctuation token">(</SPAN>workspace<SPAN class="punctuation token">,</SPAN> datatypes<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN> &nbsp;&nbsp;&nbsp; <SPAN class="string token">""" &nbsp;&nbsp;&nbsp; Generates full path names under a catalog tree for all requested &nbsp;&nbsp;&nbsp; datatype(s). &nbsp;&nbsp;&nbsp; Parameters: &nbsp;&nbsp;&nbsp; workspace: string &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The top-level workspace that will be used. &nbsp;&nbsp;&nbsp; datatypes: string | list | tuple &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Keyword(s) representing the desired datatypes. A single &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; datatype can be expressed as a string, otherwise use &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a list or tuple. See arcpy.da.Walk documentation &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for a full list. &nbsp;&nbsp;&nbsp; """</SPAN> &nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> path<SPAN class="punctuation token">,</SPAN> path_names<SPAN class="punctuation token">,</SPAN> data_names <SPAN class="keyword token">in</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>Walk<SPAN class="punctuation token">(</SPAN> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; workspace<SPAN class="punctuation token">,</SPAN> datatype<SPAN class="operator token">=</SPAN>datatypes<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> data_name <SPAN class="keyword token">in</SPAN> data_names<SPAN class="punctuation token">:</SPAN> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">yield</SPAN> os<SPAN class="punctuation token">.</SPAN>path<SPAN class="punctuation token">.</SPAN>join<SPAN class="punctuation token">(</SPAN>path<SPAN class="punctuation token">,</SPAN> data_name<SPAN class="punctuation token">)</SPAN> AGSHOME <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetInstallInfo<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Desktop"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">"InstallDir"</SPAN><SPAN class="punctuation token">]</SPAN>&nbsp; translatorpath <SPAN class="operator token">=</SPAN> AGSHOME <SPAN class="operator token">+</SPAN> <SPAN class="string token">"Metadata\\Translator\\ARCGIS2FGDC.xml"</SPAN> outfile <SPAN class="operator token">=</SPAN> <SPAN class="string token">"C:\\GIS\\Records\\Data Management\\Inventories\\GIS_Data_Inventory_daWalk_function_outputtocsv_descitems_try_sr_meta.csv"</SPAN> xmlfile <SPAN class="operator token">=</SPAN> <SPAN class="string token">"C:\\GIS\\Records\\Data Management\\Inventories\\TempInventoryError\\daWalk_function_outputtocsv_descitems_try_sr_meta.xml"</SPAN> <SPAN class="keyword token">with</SPAN> open <SPAN class="punctuation token">(</SPAN>outfile<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'wb'</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> csvfile<SPAN class="punctuation token">:</SPAN> &nbsp;&nbsp;&nbsp; csvwriter <SPAN class="operator token">=</SPAN> csv<SPAN class="punctuation token">.</SPAN>writer<SPAN class="punctuation token">(</SPAN>csvfile<SPAN class="punctuation token">)</SPAN> &nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> feature_class <SPAN class="keyword token">in</SPAN> inventory_data<SPAN class="punctuation token">(</SPAN>r<SPAN class="string token">"C:\GIS\Data\Natural_Environment\Species_and_Habitats\Habitat_Models"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"FeatureClass"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">try</SPAN><SPAN class="punctuation token">:</SPAN> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; desc <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>feature_class<SPAN class="punctuation token">)</SPAN> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sr <SPAN class="operator token">=</SPAN> desc<SPAN class="punctuation token">.</SPAN>spatialReference &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>ExportMetadata_conversion<SPAN class="punctuation token">(</SPAN>feature_class<SPAN class="punctuation token">,</SPAN> translatorpath<SPAN class="punctuation token">,</SPAN> xmlfile<SPAN class="punctuation token">)</SPAN>&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tree <SPAN class="operator token">=</SPAN> ElementTree<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tree<SPAN class="punctuation token">.</SPAN>parse<SPAN class="punctuation token">(</SPAN>xmlfile<SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; spot <SPAN class="operator token">=</SPAN> tree<SPAN class="punctuation token">.</SPAN>find<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"idinfo/descript/purpose"</SPAN><SPAN class="punctuation token">)</SPAN> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; csvwriter<SPAN class="punctuation token">.</SPAN>writerow<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN>desc<SPAN class="punctuation token">.</SPAN>path<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> desc<SPAN class="punctuation token">.</SPAN>file<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> desc<SPAN class="punctuation token">.</SPAN>dataType<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> sr<SPAN class="punctuation token">.</SPAN>name<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> spot<SPAN class="punctuation token">.</SPAN>text<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">except</SPAN><SPAN class="punctuation token">:</SPAN> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">pass</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 class="" style="color: #101094; border: 0px; font-size: 13px;"></SPAN>

ShannonGroff

Well, I got it working. I tried inserting three if statements (1 for each metadata component), but it would only print my else value ("No Abstract") even if there was a value for the abstract. Instead, I inserted three try/except statements (again, 1 for each metadata component I was trying to grab) and it's working great! Thank you both for your help

The only missing piece as far as I can tell is a known issue with arcpy.da.Walk, which is that it does not list rasters within gdb. I'm not sure why that's the case, but it only lists fc within the gdb even though it will list rasters that are within a folder. Not sure how to get around that. In a perfect world I would include an if statement somehow (if gdb ...arcpy.ListRasters) but I don't know where to start on that.

<SPAN class="comment token">#This script uses arcpy.da.walk to inventory the data contained within a folder. It only captures feature classes, shapefiles and raster bands.</SPAN>

<SPAN class="comment token">#For each feature class, shapefile or raster band it exports to a csv: file path, data name, data type, spatial reference name, metadata purpose, metadata abstract, and metadata publication date</SPAN>
<SPAN class="comment token">#For those feature classes that are missing any of the metadata items, it prints "No Purpose", "No Abstract" and/or "No Publication Date".</SPAN>

<SPAN class="comment token">#A known issue with this script is that it does not include rasters contained with .gdb (this is an issue with arcpy.da.walk). It may be able to be fixed with an if statement</SPAN>
<SPAN class="comment token">#(something along the lines of "If gdb...arcpy.ListRasters") but I have not tried to do that.</SPAN>

<SPAN class="comment token"><SPAN>#This script was created with the help of </SPAN><A class="jive-link-external-small" href="https://community.esri.com/external-link.jspa?url=https%3A%2F%2Farcpy.wordpress.com%2F2012%2F12%2F10%2Finventorying-data-a-new-approach%2F" target="_blank">https://arcpy.wordpress.com/2012/12/10/inventorying-data-a-new-approach/</A><SPAN> and </SPAN><A class="jive-link-thread-small" data-containerid="2145" data-containertype="14" data-objectid="30556" data-objecttype="1" href="https://community.esri.com/thread/30556" target="_blank">https://community.esri.com/thread/30556</A></SPAN>

<SPAN class="comment token">#Three variables need to be updated each time this script is run on a new workspace...those variables are commented below (outfile, xmlfile and workspace when calling inventory_data).</SPAN>

<SPAN class="comment token">#Created 12/1/2016</SPAN>

<SPAN class="comment token">#Created by: Shannon Groff</SPAN>

<SPAN class="keyword token">import</SPAN> os
<SPAN class="keyword token">import</SPAN> arcpy
<SPAN class="keyword token">import</SPAN> csv
<SPAN class="keyword token">from</SPAN> xml<SPAN class="punctuation token">.</SPAN>etree<SPAN class="punctuation token">.</SPAN>ElementTree <SPAN class="keyword token">import</SPAN> ElementTree
<SPAN class="keyword token">from</SPAN> arcpy <SPAN class="keyword token">import</SPAN> env

arcpy<SPAN class="punctuation token">.</SPAN>env<SPAN class="punctuation token">.</SPAN>overwriteOutput <SPAN class="operator token">=</SPAN> <SPAN class="token boolean">True</SPAN>
 
<SPAN class="keyword token">def</SPAN> <SPAN class="token function">inventory_data</SPAN><SPAN class="punctuation token">(</SPAN>workspace<SPAN class="punctuation token">,</SPAN> datatypes<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> path<SPAN class="punctuation token">,</SPAN> path_names<SPAN class="punctuation token">,</SPAN> data_names <SPAN class="keyword token">in</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>Walk<SPAN class="punctuation token">(</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; workspace<SPAN class="punctuation token">,</SPAN> datatype<SPAN class="operator token">=</SPAN>datatypes<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> data_name <SPAN class="keyword token">in</SPAN> data_names<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">yield</SPAN> os<SPAN class="punctuation token">.</SPAN>path<SPAN class="punctuation token">.</SPAN>join<SPAN class="punctuation token">(</SPAN>path<SPAN class="punctuation token">,</SPAN> data_name<SPAN class="punctuation token">)</SPAN>

AGSHOME <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetInstallInfo<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Desktop"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">"InstallDir"</SPAN><SPAN class="punctuation token">]</SPAN>&nbsp; 
translatorpath <SPAN class="operator token">=</SPAN> AGSHOME <SPAN class="operator token">+</SPAN> <SPAN class="string token">"Metadata\\Translator\\ARCGIS2FGDC.xml"</SPAN>

<SPAN class="comment token">#These two variables need to be updated each time this script is run on a new workspace</SPAN>
outfile <SPAN class="operator token">=</SPAN> r<SPAN class="string token">"C:\GIS\Records\Data Management\Inventories\GIS_Data_Inventory.csv"</SPAN>
xmlfile <SPAN class="operator token">=</SPAN> r<SPAN class="string token">"C:\GIS\Records\Data Management\Inventories\Inventory\TempInventoryError\GIS_Data_Inventory.xml"</SPAN>

<SPAN class="keyword token">with</SPAN> open <SPAN class="punctuation token">(</SPAN>outfile<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'wb'</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> csvfile<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; csvwriter <SPAN class="operator token">=</SPAN> csv<SPAN class="punctuation token">.</SPAN>writer<SPAN class="punctuation token">(</SPAN>csvfile<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="comment token">#You need to update workspace in the line below</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">for</SPAN> feature_class <SPAN class="keyword token">in</SPAN> inventory_data<SPAN class="punctuation token">(</SPAN>r<SPAN class="string token">"C:\GIS\Data\Natural_Environment\Species_and_Habitats\Species_Data"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"FeatureClass"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">try</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; desc <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Describe<SPAN class="punctuation token">(</SPAN>feature_class<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sr <SPAN class="operator token">=</SPAN> desc<SPAN class="punctuation token">.</SPAN>spatialReference
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>ExportMetadata_conversion<SPAN class="punctuation token">(</SPAN>feature_class<SPAN class="punctuation token">,</SPAN> translatorpath<SPAN class="punctuation token">,</SPAN> xmlfile<SPAN class="punctuation token">)</SPAN>&nbsp; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tree <SPAN class="operator token">=</SPAN> ElementTree<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tree<SPAN class="punctuation token">.</SPAN>parse<SPAN class="punctuation token">(</SPAN>xmlfile<SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp; 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; spot <SPAN class="operator token">=</SPAN> tree<SPAN class="punctuation token">.</SPAN>find<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"idinfo/descript/purpose"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">try</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; purpose <SPAN class="operator token">=</SPAN> tree<SPAN class="punctuation token">.</SPAN>find<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"idinfo/descript/purpose"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>text
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">except</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; purpose <SPAN class="operator token">=</SPAN> <SPAN class="string token">"No Purpose"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">try</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; abstract <SPAN class="operator token">=</SPAN> tree<SPAN class="punctuation token">.</SPAN>find <SPAN class="punctuation token">(</SPAN><SPAN class="string token">"idinfo/descript/abstract"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>text
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">except</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; abstract <SPAN class="operator token">=</SPAN> <SPAN class="string token">"No Abstract"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">try</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pubdate <SPAN class="operator token">=</SPAN> tree<SPAN class="punctuation token">.</SPAN>find <SPAN class="punctuation token">(</SPAN><SPAN class="string token">"idinfo/citation/citeinfo/pubdate"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>text
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">except</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pubdate <SPAN class="operator token">=</SPAN> <SPAN class="string token">"No Publication Date"</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; csvwriter<SPAN class="punctuation token">.</SPAN>writerow<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN>desc<SPAN class="punctuation token">.</SPAN>path<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> desc<SPAN class="punctuation token">.</SPAN>file<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> desc<SPAN class="punctuation token">.</SPAN>dataType<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> sr<SPAN class="punctuation token">.</SPAN>name<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> purpose<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> abstract<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> pubdate<SPAN class="punctuation token">.</SPAN>encode<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'utf-8'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">except</SPAN> Exception<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e <SPAN class="operator token">=</SPAN> sys<SPAN class="punctuation token">.</SPAN>exc_info<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN><SPAN class="punctuation token">(</SPAN>e<SPAN class="punctuation token">.</SPAN>args<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</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>