如何用python-pptx调整环形图大小并在单页幻灯片放置多幅

要在单页幻灯片中添加1-3幅环形图并自动适配尺寸，核心是根据图表数量动态计算每个图表的位置与大小，同时合理规划幻灯片布局避免元素重叠。以下是调整后的完整实现：

关键调整思路 #

• 避开标题区域，定义专属的图表摆放范围，确保标题与图表不重叠
• 针对1/2/3三种图表数量，设计不同的布局规则：
  • 1个图表：占据图表区域的大部分空间，居中放置
  • 2个图表：左右并排，中间留合理间距
  • 3个图表：采用左一右二的布局，左侧大图表、右侧上下两个小图表
• 封装图表创建逻辑，通过循环批量生成对应数量的环形图

完整代码 #

from pptx import Presentation
from pptx.util import Pt, Cm
from pptx.chart.data import ChartData
from pptx.enum.chart import XL_CHART_TYPE


def create_ppt(chart_count=1):
    # 限制图表数量范围
    if chart_count not in (1, 2, 3):
        raise ValueError("仅支持添加1、2、3个环形图")

    pr = Presentation()
    # 使用空白幻灯片布局，避免默认占位框干扰
    slide_layout = pr.slide_layouts[6]
    slide1 = pr.slides.add_slide(slide_layout)

    # 添加标题
    title_shape = slide1.shapes.add_textbox(left=Cm(0), top=Cm(1), width=Cm(25), height=Cm(3))
    title_text_frame = title_shape.text_frame
    title_paragraph = title_text_frame.add_paragraph()
    title_paragraph.text = "Data"
    title_paragraph.font.name = "Arial (Headings)"
    title_paragraph.font.size = Pt(34)

    # 定义图表区域边界（避开标题，左右留边）
    chart_area_left = Cm(1)
    chart_area_top = Cm(4)
    chart_area_width = Cm(23)
    chart_area_height = Cm(14)

    # 测试数据集，可替换为实际业务数据
    chart_datasets = [
        (["X1", "X2", "X3", "X4"], [75, 10, 5, 4], "数据1"),
        (["A", "B", "C"], [40, 35, 25], "数据2"),
        (["P", "Q", "R", "S", "T"], [20, 30, 15, 25, 10], "数据3")
    ]

    # 根据图表数量计算每个图表的位置和尺寸
    charts_info = []
    if chart_count == 1:
        # 单个图表居中放置
        x = chart_area_left + (chart_area_width - Cm(18)) / 2
        y = chart_area_top + (chart_area_height - Cm(12)) / 2
        charts_info.append((x, y, Cm(18), Cm(12)))
    elif chart_count == 2:
        # 两个图表左右并排，中间留1cm间距
        single_width = (chart_area_width - Cm(1)) / 2
        x1, y1 = chart_area_left, chart_area_top
        x2 = chart_area_left + single_width + Cm(1)
        charts_info.extend([(x1, y1, single_width, chart_area_height), (x2, y1, single_width, chart_area_height)])
    elif chart_count == 3:
        # 左一右二布局：左侧大图表，右侧上下两个小图表
        left_width = chart_area_width * 0.55
        right_width = chart_area_width * 0.4
        right_height = (chart_area_height - Cm(1)) / 2
        x_left, y_left = chart_area_left, chart_area_top
        x_right = chart_area_left + left_width + Cm(1)
        y_right_top = chart_area_top
        y_right_bottom = chart_area_top + right_height + Cm(1)
        charts_info.extend([
            (x_left, y_left, left_width, chart_area_height),
            (x_right, y_right_top, right_width, right_height),
            (x_right, y_right_bottom, right_width, right_height)
        ])

    # 循环创建环形图
    for idx, (x, y, cx, cy) in enumerate(charts_info):
        categories, values, series_name = chart_datasets[idx]
        chart_data = ChartData()
        chart_data.categories = categories
        chart_data.add_series(series_name, values)
        chart = slide1.shapes.add_chart(
            XL_CHART_TYPE.DOUGHNUT, x, y, cx, cy, chart_data
        ).chart
        chart.has_legend = True
        chart.legend.include_in_layout = False
        apply_data_labels(chart)

    pr.save(f"多环形图演示_{chart_count}个.pptx")


def apply_data_labels(chart):
    plot = chart.plots[0]
    plot.has_data_labels = True
    for series in plot.series:
        for idx, point in enumerate(series.points):
            data_label = point.data_label
            data_label.has_text_frame = True
            data_label.text_frame.text = str(series.values[idx])


# 调用示例：创建包含3个环形图的幻灯片
create_ppt(chart_count=3)

代码说明 #

1. 布局控制：使用空白幻灯片布局，手动添加标题，避免默认占位框影响图表位置
2. 动态适配：通过chart_count参数自动切换布局规则，无需手动调整坐标
3. 数据灵活替换：chart_datasets可直接替换为实际业务数据，支持不同维度的环形图展示
4. 标签优化：简化数据标签赋值逻辑，用enumerate替代计数器，代码更简洁

内容的提问来源于stack exchange，提问作者ninjacode