Diverging Bar (Positive/Negative Color)

from dataviz import save, bar
from dataviz.core.theme import Theme


def main() raises:
    var quarters: List[String] = ["Q1", "Q2", "Q3", "Q4", "Q5", "Q6"]
    var net_change: List[Float64] = [15.0, -8.0, 22.0, -3.0, 10.0, -12.0]

    var c_diverging = bar(quarters, net_change, theme=Theme(color_by_sign=True))
    # A distinct output filename from bar.mojo's own "Diverging bars"
    # Example (out_bar_diverging.svg) -- that block stays in bar()'s
    # own docstring purely so the Bar Examples page keeps its existing
    # Variant section; this file is now the Cookbook's own source for
    # the same technique, and both writing the same path in parallel
    # (pixi run example) would race.
    save(c_diverging, "docs/src/examples/out_diverging_bar.svg")