using sphinx_multiversion to generate multiple versions doc

docs/_templates/versioning.htm

+{% if versions %}
+<h3>{{ _('Versions') }}</h3>
+<ul>
+  {%- for item in versions %}
+  <li><a href="{{ item.url }}">{{ item.name }}</a></li>
+  {%- endfor %}
+</ul>
+{% endif %}sphinx-multiversion
\ No newline at end of file

docs/_templates/versions.html

+{%- if current_version %}
+<div class="rst-versions" data-toggle="rst-versions" role="note" aria-label="versions">
+  <span class="rst-current-version" data-toggle="rst-current-version">
+    <span class="fa fa-book"> Other Versions</span>
+    v: {{ current_version.name }}
+    <span class="fa fa-caret-down"></span>
+  </span>
+  <div class="rst-other-versions">
+    {%- if versions.tags %}
+    <dl>
+      <dt>Tags</dt>
+      {%- for item in versions.tags %}
+      <dd><a href="{{ item.url }}">{{ item.name }}</a></dd>
+      {%- endfor %}
+    </dl>
+    {%- endif %}
+    {%- if versions.branches %}
+    <dl>
+      <dt>Branches</dt>
+      {%- for item in versions.branches %}
+      <dd><a href="{{ item.url }}">{{ item.name }}</a></dd>
+      {%- endfor %}
+    </dl>
+    {%- endif %}
+  </div>
+</div>
+{%- endif %}
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docs/conf.py

@@ -48,11 +48,18 @@ extensions = [
     'sphinx.ext.napoleon',
     'nbsphinx',
     'myst_parser',
+    'sphinx_multiversion',
 ]
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
+html_sidebars = {
+    '**': [
+        'versioning.html',
+    ],
+}
+
 # Parsers
 # source_parsers = {
 # }
@@ -85,4 +92,25 @@ html_theme = 'sphinx_rtd_theme'
 html_static_path = ['_static']
 
 # nbsphinx
-nbsphinx_allow_errors = True
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+nbsphinx_allow_errors = True
+
+
+# sphinx-multiversion
+# Whitelist pattern for tags (set to None to ignore all tags)
+smv_tag_whitelist = r'^.*$'
+
+# Whitelist pattern for branches (set to None to ignore all branches)
+# smv_branch_whitelist = r'^.*$'
+smv_branch_whitelist = None
+
+# Whitelist pattern for remotes (set to None to use local branches only)
+smv_remote_whitelist = None
+
+# Pattern for released versions
+smv_released_pattern = r'^tags/.*$'
+
+# Format for versioned output directories inside the build directory
+smv_outputdir_format = '{ref.name}'
+
+# Determines whether remote or local git branches/tags are preferred if their output dirs conflict
+smv_prefer_remote_refs = False
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docs/doc_requirements.txt

@@ -2,4 +2,5 @@ sphinx>=3
 nbsphinx
 sphinx_rtd_theme
 myst-parser
-ipykernel
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+ipykernel
+sphinx_multiversion
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