{#- Minimally patched from upstream mkdocstrings-python:
material/_base/function.html.jinja

Our deviations from upstream are marked with `CHANGE relative to upstream`
comments below:
  - prefix each signature (and overload) with a `def ` keyword
  - drop the `first` CSS class (better formatting for the common API index)
Re-derive from the installed upstream template when bumping mkdocstrings,
re-applying those changes.
-#}

{% block logs scoped %}
  {{ log.debug("Rendering " + function.path) }}
{% endblock logs %}

{% import "language"|get_template as lang with context %}

<div class="doc doc-object doc-function">
  {% with obj = function, html_id = function.path %}

    {% if root %}
      {% set show_full_path = config.show_root_full_path %}
      {% set root_members = True %}
    {% elif root_members %}
      {% set show_full_path = config.show_root_members_full_path or config.show_object_full_path %}
      {% set root_members = False %}
    {% else %}
      {% set show_full_path = config.show_object_full_path %}
    {% endif %}

    {% set function_name = function.path if show_full_path else function.name %}
    {% set symbol_type = "method" if function.parent.is_class else "function" %}

    {% if not root or config.show_root_heading %}
      {% filter heading(
          heading_level,
          role="function",
          id=html_id,
          class="doc doc-heading",
          toc_label=(('<code class="doc-symbol doc-symbol-toc doc-symbol-' + symbol_type + '"></code>&nbsp;')|safe if config.show_symbol_type_toc else '') + (config.toc_label if config.toc_label and root else function.name),
        ) %}

        {% block heading scoped %}
          {% if config.show_symbol_type_heading %}<code class="doc-symbol doc-symbol-heading doc-symbol-{{ symbol_type }}"></code>{% endif %}
          {% if config.heading and root %}
            {{ config.heading }}
          {% elif config.separate_signature %}
            <span class="doc doc-object-name doc-function-name">{{ function_name }}</span>
          {% else %}
            {%+ filter highlight(language="python", inline=True) -%}
              {{ function_name }}{% include "signature"|get_template with context %}
            {%- endfilter %}
          {% endif %}
        {% endblock heading %}

        {% block labels scoped %}
          {% with labels = function.labels %}
            {% include "labels"|get_template with context %}
          {% endwith %}
        {% endblock labels %}

      {% endfilter %}

      {% block signature scoped %}
        {% if function.overloads and config.show_overloads %}
          {# CHANGE relative to upstream: prefix each signature with a `def ` keyword. #}
          {# `format_signature` deliberately omits it, but we prefer the fuller form. #}
          {# It always emits the function name as the first `nf` span, so inject before that. #}
          <div class="doc-overloads">
            {% for overload in function.overloads %}
              {% set rendered_overload %}
                {% filter format_signature(overload, config.line_length, annotations=True, crossrefs=config.signature_crossrefs) %}
                  {{ overload.name }}
                {% endfilter %}
              {% endset %}
              {% autoescape false %}
                {{ rendered_overload | replace('<span class="nf">', '<span class="k">def </span><span class="nf">', 1) }}
              {% endautoescape %}
            {% endfor %}
          </div>
        {% endif %}
        {% if config.separate_signature %}
          {% set rendered_signature %}
            {% filter format_signature(function, config.line_length, crossrefs=config.signature_crossrefs) %}
              {{ function_name }}
            {% endfilter %}
          {% endset %}
          {% autoescape false %}
            {{ rendered_signature | replace('<span class="nf">', '<span class="k">def </span><span class="nf">', 1) }}
          {% endautoescape %}
        {% endif %}
      {% endblock signature %}

    {% else %}

      {% if config.show_root_toc_entry %}
        {% filter heading(
            heading_level,
            role="function",
            id=html_id,
            toc_label=(('<code class="doc-symbol doc-symbol-toc doc-symbol-' + symbol_type + '"></code>&nbsp;')|safe if config.show_symbol_type_toc else '') + (config.toc_label if config.toc_label and root else function.name),
            hidden=True,
          ) %}
        {% endfilter %}
      {% endif %}
      {% set heading_level = heading_level - 1 %}
    {% endif %}

    {# CHANGE relative to upstream: don't apply the 'first' class. It causes worse CSS #}
    {# formatting for our generated common API index, since we inline bare functions #}
    {# that become root-level rather than modules. #}
    <div class="doc doc-contents">
      {% block contents scoped %}
        {% block docstring scoped %}
          {% with docstring_sections = function.docstring.parsed %}
            {% include "docstring"|get_template with context %}
          {% endwith %}
        {% endblock docstring %}

        {% if config.backlinks %}
          <backlinks identifier="{{ html_id }}" handler="python" />
        {% endif %}

        {% block source scoped %}
          {% if config.show_source and function.source %}
            <details class="quote">
              <summary>{{ lang.t("Source code in") }} <code>
                {%- if function.relative_filepath.is_absolute() -%}
                  {{ function.relative_package_filepath }}
                {%- else -%}
                  {{ function.relative_filepath }}
                {%- endif -%}
              </code></summary>
              {{ function.source|highlight(language="python", linestart=function.lineno or 0, linenums=True) }}
            </details>
          {% endif %}
        {% endblock source %}
      {% endblock contents %}
    </div>

  {% endwith %}
</div>