Index: Documentation/html/Documentation/Api/api_python.html
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--- Documentation/html/Documentation/Api/api_python.html	(revision ba9923062b4af98cbdd20c4101c305766fc728f5)
+++ Documentation/html/Documentation/Api/api_python.html	(revision 30f7911a6e9f08ea7e46542a8f3383d7cd5b8f00)
@@ -2216,7 +2216,15 @@
 <em class="property">class </em><code class="descclassname">GribUtil.</code><code class="descname">GribUtil</code><span class="sig-paren">(</span><em>filenames</em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/GribUtil.html#GribUtil"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#GribUtil.GribUtil" title="Permalink to this definition">¶</a></dt>
 <dd><p>Class for GRIB utilities (new methods) based on GRIB API</p>
+<p>The GRIB API provides all necessary tools to work directly with the
+grib files. Nevertheless, the GRIB API tools are very basic and are in
+direct connection with the grib files. This class provides some higher
+functions which apply a set of GRIB API tools together in the respective
+context. So, the class initially contains a list of grib files (their
+names) and the using program then applies the methods directly on the
+class objects without having to think about how the actual GRIB API
+tools have to be arranged.</p>
 <dl class="method">
 <dt id="GribUtil.GribUtil.copy_dummy_msg">
-<code class="descname">copy_dummy_msg</code><span class="sig-paren">(</span><em>filename_in</em>, <em>selectWhere=True</em>, <em>keynames=[]</em>, <em>keyvalues=[]</em>, <em>filemode='w'</em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/GribUtil.html#GribUtil.copy_dummy_msg"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#GribUtil.GribUtil.copy_dummy_msg" title="Permalink to this definition">¶</a></dt>
+<code class="descname">copy_dummy_msg</code><span class="sig-paren">(</span><em>filename_in</em>, <em>selectWhere=True</em>, <em>keynames=[]</em>, <em>keyvalues=[]</em>, <em>filemode='wb'</em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/GribUtil.html#GribUtil.copy_dummy_msg"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#GribUtil.GribUtil.copy_dummy_msg" title="Permalink to this definition">¶</a></dt>
 <dd><p>Add the content of another input grib file to the objects file but
 only messages corresponding to keys/values passed to the function.
@@ -2234,5 +2242,5 @@
 <li><strong>keynames</strong> (<code class="xref py py-obj docutils literal notranslate"><span class="pre">list</span></code> of <code class="xref py py-obj docutils literal notranslate"><span class="pre">string</span></code>, optional) – List of keynames. Default is an empty list.</li>
 <li><strong>keyvalues</strong> (<code class="xref py py-obj docutils literal notranslate"><span class="pre">list</span></code> of <code class="xref py py-obj docutils literal notranslate"><span class="pre">string</span></code>, optional) – List of keyvalues. Default is an empty list.</li>
-<li><strong>filemode</strong> (<code class="xref py py-obj docutils literal notranslate"><span class="pre">string</span></code>, optional) – Sets the mode for the output file. Default is “w”.</li>
+<li><strong>filemode</strong> (<code class="xref py py-obj docutils literal notranslate"><span class="pre">string</span></code>, optional) – Sets the mode for the output file. Default is “wb”.</li>
 </ul>
 </td>
@@ -2298,5 +2306,5 @@
 <dl class="method">
 <dt id="GribUtil.GribUtil.set_keys">
-<code class="descname">set_keys</code><span class="sig-paren">(</span><em>fromfile</em>, <em>keynames</em>, <em>keyvalues</em>, <em>wherekeynames=[]</em>, <em>wherekeyvalues=[]</em>, <em>strict=False</em>, <em>filemode='w'</em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/GribUtil.html#GribUtil.set_keys"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#GribUtil.GribUtil.set_keys" title="Permalink to this definition">¶</a></dt>
+<code class="descname">set_keys</code><span class="sig-paren">(</span><em>fromfile</em>, <em>keynames</em>, <em>keyvalues</em>, <em>wherekeynames=[]</em>, <em>wherekeyvalues=[]</em>, <em>strict=False</em>, <em>filemode='wb'</em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/GribUtil.html#GribUtil.set_keys"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#GribUtil.GribUtil.set_keys" title="Permalink to this definition">¶</a></dt>
 <dd><p>Opens the file to read the grib messages and then write
 the selected messages (with wherekeys) to a new output file.
@@ -2319,5 +2327,5 @@
 is written out the grib file (False) or only those
 meeting the where statement (True). Default is False.</li>
-<li><strong>filemode</strong> (<code class="xref py py-obj docutils literal notranslate"><span class="pre">string</span></code>, optional) – Sets the mode for the output file. Default is “w”.</li>
+<li><strong>filemode</strong> (<code class="xref py py-obj docutils literal notranslate"><span class="pre">string</span></code>, optional) – Sets the mode for the output file. Default is “wb”.</li>
 </ul>
 </td>
