> ## Documentation Index
> Fetch the complete documentation index at: https://ibm-llm-runtime-aaf3a78b.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# mellea.stdlib.requirements.plotting.matplotlib

> Matplotlib-specific code generation requirements.

export const SidebarFix = () => <script dangerouslySetInnerHTML={{
  __html: `
        (function () {
          const INTERVAL_MS = 500;

          const upgradeSidebar = () => {
            const links = document.querySelectorAll('a[href^="#"]');

            links.forEach((link) => {
              if (link.dataset.badged === "true") return;

              const rawText = (link.textContent || "").trim();

              // ========== FUNC ==========
              if (rawText.startsWith("FUNC ")) {
                const label = rawText.replace(/^FUNC\\s+/, "").trim();

                while (link.firstChild) link.removeChild(link.firstChild);

                // 👉 Make the whole link a single flex row & prevent wrapping
                link.style.display = "flex";
                link.style.alignItems = "center";
                link.style.whiteSpace = "nowrap";
                link.style.columnGap = "0.5rem";

                const badge = document.createElement("span");
                badge.style.marginRight = "0.5rem";
                badge.style.display = "inline-flex";
                badge.style.alignItems = "center";
                badge.style.borderRadius = "9999px";
                badge.style.padding = "0rem 0.6rem";
                badge.style.fontSize = "0.5rem";
                badge.style.fontWeight = "700";
                badge.style.letterSpacing = "0.05em";
                badge.style.backgroundColor = "rgba(48, 100, 227, 0.20)";
                badge.style.color = "#1D4ED8";

                badge.textContent = "FUNC";

                link.appendChild(badge);
                link.appendChild(document.createTextNode(label));
                link.dataset.badged = "true";
                return;
              }

              // ========== CLASS ==========
              if (rawText.startsWith("CLASS ")) {
                const label = rawText.replace(/^CLASS\\s+/, "").trim();

                while (link.firstChild) link.removeChild(link.firstChild);

                // 👉 Same flex / nowrap treatment for class links
                link.style.display = "flex";
                link.style.alignItems = "center";
                link.style.whiteSpace = "nowrap";
                link.style.columnGap = "0.5rem";

                const badge = document.createElement("span");
                badge.style.marginRight = "0.5rem";
                badge.style.display = "inline-flex";
                badge.style.alignItems = "center";
                badge.style.borderRadius = "9999px";
                badge.style.padding = "0rem 0.6rem";
                badge.style.fontSize = "0.5rem";
                badge.style.fontWeight = "700";
                badge.style.letterSpacing = "0.05em";
                badge.style.backgroundColor = "rgba(74, 222, 128, 0.20)";
                badge.style.color = "#15803D";

                badge.textContent = "CLASS";

                link.appendChild(badge);
                link.appendChild(document.createTextNode(label));
                link.dataset.badged = "true";
                return;
              }
            });
          };

          upgradeSidebar();
          setInterval(upgradeSidebar, INTERVAL_MS);
        })();
      `
}} />;

<SidebarFix />

Matplotlib-specific code generation requirements.

This module validates Python code that uses matplotlib for plotting, ensuring
proper headless backend configuration, file I/O, and dependency availability.

## Classes

<div className="w-full h-px bg-gray-200 dark:bg-gray-700 my-4" />

### <span className="ml-2 inline-flex items-center rounded-full px-2 py-1 text-[0.7rem] font-bold tracking-wide bg-[#4ADE8033]/20 text-[#15803D]">CLASS</span> `MatplotlibHeadlessBackend` <sup><a href="https://github.com/generative-computing/mellea/blob/v0.7.0.dev0/mellea/stdlib/requirements/plotting/matplotlib.py#L196" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

Validates that matplotlib is configured with a headless backend.

Matplotlib must be explicitly configured with a headless backend (e.g., 'Agg')
via matplotlib.use() before importing pyplot. Interactive backends like 'TkAgg'
will fail because they require a display server.

<div className="w-full h-px bg-gray-200 dark:bg-gray-700 my-4" />

### <span className="ml-2 inline-flex items-center rounded-full px-2 py-1 text-[0.7rem] font-bold tracking-wide bg-[#4ADE8033]/20 text-[#15803D]">CLASS</span> `PlotFileSaved` <sup><a href="https://github.com/generative-computing/mellea/blob/v0.7.0.dev0/mellea/stdlib/requirements/plotting/matplotlib.py#L253" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

Validates that a plot is explicitly saved to a file.

The plot must be saved using savefig() with the specified output\_path.
This prevents interactive plot displays (plt.show()) and ensures output
can be captured and verified.

**Args:**

* `output_path`: File path where the plot should be saved (e.g., '/tmp/plot.png').

<div className="w-full h-px bg-gray-200 dark:bg-gray-700 my-4" />

### <span className="ml-2 inline-flex items-center rounded-full px-2 py-1 text-[0.7rem] font-bold tracking-wide bg-[#4ADE8033]/20 text-[#15803D]">CLASS</span> `PlotDependenciesAvailable` <sup><a href="https://github.com/generative-computing/mellea/blob/v0.7.0.dev0/mellea/stdlib/requirements/plotting/matplotlib.py#L300" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

Validates that matplotlib and numpy are importable.

Both matplotlib and numpy must be available in the execution environment.
This requirement checks import availability but does not execute code.

<div className="w-full h-px bg-gray-200 dark:bg-gray-700 my-4" />