pyecharts源码解读（17）HTML组件包components之表格组件Table
当前pyecharts的版本为1.9.0。
components包概述
components包位于pyecharts包顶级目录中，用于定义pyecharts的HTML组件。包结构如下：
├─components # HTML组件包
│ │ image.py # 定义图像组件类Image
│ │ table.py # 定义表格组件类Table
│ │ __init__.py # 重构命名空间，将组件类命名空间提升至components包命名空间
目前HTML组件类Table 和Image 与复合图表类Page不兼容。
Table类
pyecharts/components/table.py模块只定义了表格组件类Table。
Table类继承自基类ChartMixin，作用为绘制表格。功能依赖第三方库prettytable（pyecharts依赖库）。
Table类的签名为class Table(page_title: str = CurrentConfig.PAGE_TITLE, js_host: str = "")。
Table类的构造方法参数如下：
js_host：JavaScript库的URL。字符串，默认值为""。page_title：HTML页面标题。字符串，默认值为全局变量CurrentConfig.PAGE_TITLE。
Table类的属性如下：
js_host：JavaScript库的URL。字符串，默认值为全局变量CurrentConfig.ONLINE_HOST。属性值为构造方法参数js_host与全局变量CurrentConfig.ONLINE_HOST进行或操作的结果。page_title：HTML页面标题。字符串。值为构造方法参数page_title值。js_functions：自定义JavaScript语句。类型为OrderedSet对象。默认值为OrderedSet()。js_dependencies：定义JavaScript依赖库。类型为OrderedSet对象。默认值为OrderedSet("echarts")。title_opts：表格标题配置。类型为ComponentTitleOpts对象，默认值为ComponentTitleOpts()。标题配置包括title、subtitle、title_style、subtitle_style等4个配置项。html_content：表格的HTML。字符串，默认值为""。_component_type：组件类型。字符串，默认值为"table"。chart_id：组件id。字符串，默认值为uuid.uuid4().hex。
Table类的方法如下：
add(self, headers: Sequence, rows: Sequence, attributes: Optional[dict] = None)：添加图表数据。headers：图表标题行。类型为序列。rows：图表行数据。类型为序列。attributes：图表样式属性。类型为字典。默认值为None or {"class": "fl-table"}
def set_global_opts(title_opts: Union[ComponentTitleOpts, dict, None] = None)：将表格对象的title_opts属性值设置为title_opts参数值。render：调用render包engine模块中的render函数渲染HTML文档。默认渲染模板为components.html。render_embed：调用render包engine模块中的render_embed函数输出HTML字符串。默认渲染模板为components.html。render_notebook：调用render包engine模块中的render_notebook函数将输出嵌入到notebook中。默认渲染模板为nb_components.html。
表格模板
macro部分源码：
{%- macro gen_components_content(chart) %}
{% if chart._component_type == "table" %}
<style>
.fl-table {
margin: 20px;
border-radius: 5px;
font-size: 12px;
border: none;
border-collapse: collapse;
max-width: 100%;
white-space: nowrap;
word-break: keep-all;
}
.fl-table th {
text-align: left;
font-size: 20px;
}
.fl-table tr {
display: table-row;
vertical-align: inherit;
border-color: inherit;
}
.fl-table tr:hover td {
background: #00d1b2;
color: #F8F8F8;
}
.fl-table td, .fl-table th {
border-style: none;
border-top: 1px solid #dbdbdb;
border-left: 1px solid #dbdbdb;
border-bottom: 3px solid #dbdbdb;
border-right: 1px solid #dbdbdb;
padding: .5em .55em;
font-size: 15px;
}
.fl-table td {
border-style: none;
font-size: 15px;
vertical-align: center;
border-bottom: 1px solid #dbdbdb;
border-left: 1px solid #dbdbdb;
border-right: 1px solid #dbdbdb;
height: 30px;
}
.fl-table tr:nth-child(even) {
background: #F8F8F8;
}
</style>
<div id="{{ chart.chart_id }}" class="chart-container" style="">
<p class="title" {{ chart.title_opts.title_style }}> {{ chart.title_opts.title }}</p>
<p class="subtitle" {{ chart.title_opts.subtitle_style }}> {{ chart.title_opts.subtitle }}</p>
{{ chart.html_content }}
</div>
components.html源码：
{% import 'macro' as macro %}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>{{ chart.page_title }}</title>
</head>
<body>
{{ macro.gen_components_content(chart) }}
</body>
</html>
简易图表Table案例
from pyecharts.components import Table
table = Table()
headers = ["City name", "Area", "Population", "Annual Rainfall"]
rows = [
["Brisbane", 5905, 1857594, 1146.4],
["Adelaide", 1295, 1158259, 600.5],
["Darwin", 112, 120900, 1714.7],
["Hobart", 1357, 205556, 619.5],
["Sydney", 2058, 4336374, 1214.8],
["Melbourne", 1566, 3806092, 646.9],
["Perth", 5386, 1554769, 869.4],
]
attributes={"border":"1px"}
table.add(headers, rows)
table.set_global_opts({"title":"Table-基本示例",
"subtitle":"我是副标题支持换行哦",
"title_style":"style='color:red'",
"subtitle_style":"style='color:green'"
})
table.render()
pyecharts/components/table.py模块源码
import uuid
from jinja2 import Environment
from prettytable import PrettyTable
from ..charts.mixins import ChartMixin
from ..commons.utils import OrderedSet
from ..globals import CurrentConfig
from ..options import ComponentTitleOpts
from ..render import engine
from ..types import Optional, Sequence, Union
class Table(ChartMixin):
def __init__(self, page_title: str = CurrentConfig.PAGE_TITLE, js_host: str = ""):
self.page_title = page_title
self.js_host = js_host or CurrentConfig.ONLINE_HOST
self.js_dependencies: OrderedSet = OrderedSet()
self.js_functions: OrderedSet = OrderedSet()
self.title_opts: ComponentTitleOpts = ComponentTitleOpts()
self.html_content: str = ""
self._component_type: str = "table"
self.chart_id: str = uuid.uuid4().hex
def add(self, headers: Sequence, rows: Sequence, attributes: Optional[dict] = None):
attributes = attributes or {"class": "fl-table"}
table = PrettyTable(headers, attributes=attributes)
for r in rows:
table.add_row(r)
self.html_content = table.get_html_string()
return self
def set_global_opts(self, title_opts: Union[ComponentTitleOpts, dict, None] = None):
self.title_opts = title_opts
return self
def render(
self,
path: str = "render.html",
template_name: str = "components.html",
env: Optional[Environment] = None,
**kwargs,
) -> str:
return engine.render(self, path, template_name, env, **kwargs)
def render_embed(
self,
template_name: str = "components.html",
env: Optional[Environment] = None,
**kwargs,
) -> str:
return engine.render_embed(self, template_name, env, **kwargs)
def render_notebook(self):
# only notebook env need to re-generate chart_id
self.chart_id = uuid.uuid4().hex
return engine.render_notebook(self, "nb_components.html", "nb_components.html")