Don't write zero mass fractions to xml.

doc/source/changelog.rst

@@ -4,6 +4,14 @@ Changelog
 All notable changes to this project will be documented in this file.  This
 project adheres to `Semantic Versioning <http://semver.org/spec/v2.0.0.html>`_.
 
+Version 2.7.1
+--------------
+
+Fix:
+
+  * The XML write function no longer outputs zone mass fractions if they are
+    zero.
+
 Version 2.7.0
 --------------
 

doc/source/conf.py

@@ -69,7 +69,7 @@
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = 'English'
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.

wnutils/__about__.py

@@ -2,6 +2,6 @@
 
 __title__ = "wnutils"
 __summary__ = "Python project to read and plot webnucleo files"
-__version__ = "2.7.0"
+__version__ = "2.7.1"
 __author__ = "Clemson University"
 __copyright__ = "Clemson University, 2018-2023"

wnutils/xml.py

@@ -1710,11 +1710,12 @@ def _set_xml_data_for_zone(self, zone_element, zone):
 
         mass_fracs = etree.SubElement(zone_element, "mass_fractions")
         for nuc in zone["mass fractions"]:
-            nuclide = etree.SubElement(mass_fracs, "nuclide")
-            nuclide.set("name", nuc[0])
-            etree.SubElement(nuclide, "z").text = str(nuc[1])
-            etree.SubElement(nuclide, "a").text = str(nuc[2])
-            etree.SubElement(nuclide, "x").text = str(zone["mass fractions"][nuc])
+            if zone["mass fractions"][nuc] != 0:
+                nuclide = etree.SubElement(mass_fracs, "nuclide")
+                nuclide.set("name", nuc[0])
+                etree.SubElement(nuclide, "z").text = str(nuc[1])
+                etree.SubElement(nuclide, "a").text = str(nuc[2])
+                etree.SubElement(nuclide, "x").text = str(zone["mass fractions"][nuc])
 
     def set_zone_data(self, zones):
         """Method to set the zone data.