02 pycharts 结果生成为 html 、图片（示例代码+效果图）

目录

​​1、生成HTML​​

​​2 、生成图片​​

​​make_snapshot详解​​

1、生成HTML

# render 会生成本地 HTML 文件，默认会在当前目录生成 render.html 文件
# 也可以传入路径参数，如 bar.render("mycharts.html")

from pyecharts.charts import Bar
from pyecharts import options as opts

bar = Bar() #单独调用
bar.add_xaxis(["语文", "数学", "英语", "生物", "物理", "化学", "地理"])
bar.add_yaxis("10月", [114, 95, 107, 81, 85, 87, 85])
bar.add_yaxis("11月", [106, 116, 125, 91, 88, 86, 87])
bar.add_yaxis("12月", [97, 134, 137, 89, 95, 93, 89])
bar.set_global_opts(title_opts=opts.TitleOpts(title="学生月考成绩", subtitle="马冬梅"))
bar.render()

2、 生成图片

# 如果运行完当前目录图片没有出来，可以右键项目从磁盘重新加载 Reload from Disc
# 运行报错：

WebDriverException( selenium.common.exceptions.WebDriverException: Message: 'chromedriver' executable needs to be in PATH. Please see https://chromedriver.chromium.org/home

from snapshot_selenium import snapshot as driver
from pyecharts import options as opts
from pyecharts.charts import Bar
from pyecharts.render import make_snapshot


def bar_chart() -> Bar:
    c = (
        Bar()
        .add_xaxis(["语文", "数学", "英语", "生物", "物理", "化学", "地理"])
        .add_yaxis("10月", [114, 95, 107, 81, 85, 87, 85])
        .add_yaxis("11月", [106, 116, 125, 91, 88, 86, 87])
        .add_yaxis("12月", [97, 134, 137, 89, 95, 93, 89])
        .reversal_axis()  # 翻转 XY 轴数据
        .set_series_opts(label_opts=opts.LabelOpts(position="right"))  # 将标签放置在图形右边
        .set_global_opts(title_opts=opts.TitleOpts(title="学生月考成绩", subtitle="马冬梅")) #title 主标题  subtitle副标题
    )
    return c


# 需要安装 snapshot-selenium 或者 snapshot-phantomjs
make_snapshot(driver, bar_chart().render(), "学生月考成绩-马冬梅.png")  # 生成图片到当前文件夹下

make_snapshot详解

PNG_FORMAT = "png"
JPG_FORMAT = "jpeg"
GIF_FORMAT = "gif"
PDF_FORMAT = "pdf"
SVG_FORMAT = "svg"
EPS_FORMAT = "eps"
B64_FORMAT = "base64"


def make_snapshot(
    engine: Any,
    file_name: str,
    output_name: str,
    delay: float = 2,
    pixel_ratio: int = 2,
    is_remove_html: bool = False,
    **kwargs,
):
    logger.info("Generating file ...")
    file_type = output_name.split(".")[-1]

    content = engine.make_snapshot(
        html_path=file_name,
        file_type=file_type,
        delay=delay,
        pixel_ratio=pixel_ratio,
        **kwargs,
    )
    if file_type in [SVG_FORMAT, B64_FORMAT]:
        save_as_text(content, output_name)
    else:
        # pdf, gif, png, jpeg
        content_array = content.split(",")
        if len(content_array) != 2:
            raise OSError(content_array)

        image_data = decode_base64(content_array[1])

        if file_type in [PDF_FORMAT, GIF_FORMAT, EPS_FORMAT]:
            save_as(image_data, output_name, file_type)
        elif file_type in [PNG_FORMAT, JPG_FORMAT]:
            save_as_png(image_data, output_name)
        else:
            raise TypeError(f"Not supported file type '{file_type}'")

    if "/" not in output_name:
        output_name = os.path.join(os.getcwd(), output_name)

    if is_remove_html and not file_name.startswith("http"):
        os.unlink(file_name)
    logger.info(f"File saved in {output_name}")