feat(plotnine): implement lollipop-basic (#5446)

## Implementation: `lollipop-basic` - python/plotnine

Implements the **python/plotnine** version of `lollipop-basic`.

**File:** `plots/lollipop-basic/implementations/python/plotnine.py`

**Parent Issue:** #934

---
:robot: *[impl-generate
workflow](https://github.com/MarkusNeusinger/anyplot/actions/runs/24957093138)*

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

plots/lollipop-basic/implementations/python/plotnine.py

@@ -1,12 +1,32 @@
-""" pyplots.ai
+""" anyplot.ai
 lollipop-basic: Basic Lollipop Chart
-Library: plotnine 0.15.2 | Python 3.13.11
-Quality: 92/100 | Created: 2025-12-23
+Library: plotnine 0.15.3 | Python 3.14.4
+Quality: 85/100 | Updated: 2026-04-26
 """
 
+import os
+
 import pandas as pd
-from plotnine import aes, element_line, element_text, geom_point, geom_segment, ggplot, labs, theme, theme_minimal
+from plotnine import (
+    aes,
+    element_line,
+    element_rect,
+    element_text,
+    geom_point,
+    geom_segment,
+    ggplot,
+    ggsave,
+    labs,
+    theme,
+    theme_minimal,
+)
+
 
+THEME = os.getenv("ANYPLOT_THEME", "light")
+PAGE_BG = "#FAF8F1" if THEME == "light" else "#1A1A17"
+INK = "#1A1A17" if THEME == "light" else "#F0EFE8"
+INK_SOFT = "#4A4A44" if THEME == "light" else "#B8B7B0"
+BRAND = "#009E73"
 
 # Data - Product sales by category, sorted by value
 data = {
@@ -32,23 +52,24 @@
 # Plot
 plot = (
     ggplot(df, aes(x="category", y="value"))
-    # Stems - thin lines from baseline to value
-    + geom_segment(aes(x="category", xend="category", y=0, yend="value"), color="#306998", size=1.5)
-    # Circular markers at data values
-    + geom_point(color="#306998", size=6, fill="#306998")
-    + labs(x="Product Category", y="Sales (thousands $)", title="lollipop-basic · plotnine · pyplots.ai")
+    + geom_segment(aes(x="category", xend="category", y=0, yend="value"), color=BRAND, size=1.5)
+    + geom_point(color=BRAND, size=6, fill=BRAND)
+    + labs(x="Product Category", y="Sales (thousands $)", title="lollipop-basic · plotnine · anyplot.ai")
     + theme_minimal()
     + theme(
         figure_size=(16, 9),
-        text=element_text(size=14),
-        axis_title=element_text(size=20),
-        axis_text=element_text(size=16),
-        axis_text_x=element_text(angle=45, ha="right"),
-        plot_title=element_text(size=24),
+        plot_background=element_rect(fill=PAGE_BG, color=PAGE_BG),
+        panel_background=element_rect(fill=PAGE_BG, color=PAGE_BG),
+        text=element_text(size=14, color=INK),
+        axis_title=element_text(size=20, color=INK),
+        axis_text=element_text(size=16, color=INK_SOFT),
+        axis_text_x=element_text(angle=45, ha="right", color=INK_SOFT),
+        axis_line=element_line(color=INK_SOFT),
+        plot_title=element_text(size=24, color=INK),
         panel_grid_minor=element_line(alpha=0),
         panel_grid_major_x=element_line(alpha=0),
-        panel_grid_major_y=element_line(alpha=0.3, linetype="dashed"),
+        panel_grid_major_y=element_line(color=INK, alpha=0.15, size=0.3),
     )
 )
 
-plot.save("plot.png", dpi=300)
+ggsave(plot, filename=f"plot-{THEME}.png", dpi=300, width=16, height=9)