需求是做一个简单的网页前后台分离服务，实现获得页面输入的起始时间段，后台计算多个量化指标，完成图形后，在前台实现分页签的可视化展示。 作为演示，选定“前30名涨跌幅、换手率（正排倒排）、成交量（正排倒排）”
技术基础参考利用 Flask 动态展示 Pyecharts 图表数据的几种方法一文中“Flask 前后端分离”部分，不再赘述。 主要思路是一次查询，一次计算形成结果集（dataform），并根据dataform的对应标的代码和不同指标，形成分别涨跌幅、换手率和成交图表，在前端页对应三个页签显示。
主要难点是：
pyecharts的Tab对象没有dump_options_with_quotes()方法，所以只能利用html的tab对象，后台需要把多个图形按适当方式传递到前台，前台解析后再匹配到对应的组件。
目录
- templates(页面目录)-mdStat2.html
-404.html
- util（后台目录）-dataProcess.py (数据处理)
-drawChart.py（画图）
-Utility.py（函数工具）
-firstServer.py(flask启动程序)
入口页面：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>查询股票指标报告</title>
<!-- 引入 echarts.js -->
<script src="https://cdn.bootcss.com/jquery/3.0.0/jquery.min.js"></script> // jquery引入
<script src="https://cdn.staticfile.org/echarts/4.3.0/echarts.min.js"></script> //Echarts引入
<style>
.btns input{
width:100px;
height: 40px;
background-color: #ddd;
border: 0;
}
.btns .current{
background-color: gold;
}
.cons .active{
display: block;
}
.tab1{
width: 1000px;
height: 300px;
}
.none {
display: none;
}
</style>
<script> //触发tab切换
$(function () {
var $btn = $('.btns input');
var $div = $('.cons div');
$btn.click(function () {
$(this).addClass('current').siblings().removeClass('current');
$('.cons .item').eq($(this).index()).addClass('active').siblings('.item').removeClass('active');
})
})
</script>
</head>
<body>
// 查询form
<form id="form1" onsubmit="return false" action="#" method="post">
<p id="p1">起始日期：
<input name="startDate" type="text" id="startDate" tabindex="1" size="16" value="" placeholder="起始日期"/>
</p>
<p id="p2">结束日期：
<input name="endDate" type="text" id="endDate" tabindex="2" size="16" value="" placeholder="结束日期"/>
</p>
<p><input type="submit" value="查询" onClick="getData()"></p>
</form>
<div class="btns"> //tab页签对象
<input type="button" name="" value="01" class="current">
<input type="button" name="" value="02">
<input type="button" name="" value="03">
</div>
<div class="cons">
<div class="clearfloat item none active">
<div id="tab1" class="tab1"></div>
</div>
<div class="clearfloat item none">
<div id="tab2" class="tab1"></div>
</div>
<div class="clearfloat item none">
<div id="tab3" class="tab1"></div>
</div>
</div>
<script type="text/javascript">
function getData() { //查询触发的ajax提交和返回处理
$.ajax({
type: "POST",
dataType: "json",
url: "/DataStat1" ,
data: $('#form1').serialize(),
success: function (result) {
// console.log(result["chart1"],result["chart2"])
var myChart1 = echarts.init(document.getElementById('tab1'));
var ch1=$.parseJSON(result["chart1"])
myChart1.setOption(ch1);
var myChart2 = echarts.init(document.getElementById('tab2'));
var ch2=$.parseJSON(result["chart2"])
myChart2.setOption(ch2);
},
error: function() {
alert("错误的日期！");
}
});
// alert("query！");
}
</script>
</body>
</html>
dataProcess.py和Utility.py 略过（一查一大把）最后形成，结果列表
ts_code name industry incease_rate turn_over volumn
600036 招商银行 银行 …
…
排序后即可绘图
drawChart.py
''
Created on 2023-9-3
@author: 13795
'''
from pyecharts.charts import Bar, Grid
from pyecharts import options as opts
from pyecharts.globals import ThemeType
#import os
def draw_report(df_result):
grid_increase = Grid()
#涨幅排序，第一个图
df_stock_increase=df_result.sort_values(by=['increaseCloseRate'], ascending=False)
print('df_stock_increase',df_stock_increase)
df_stock_increase=df_stock_increase[0:30]
bar1=Bar(init_opts=opts.InitOpts(theme=ThemeType.WHITE))
x1=df_stock_increase['ts_code'].tolist()
y1=df_stock_increase["increaseCloseRate"].tolist()
bar1.add_xaxis(x1)
bar1.add_yaxis('总涨幅',y1)
bar1.set_global_opts(title_opts=opts.TitleOpts(title="涨幅", subtitle="按涨幅排序")
,xaxis_opts=opts.AxisOpts(name='股票'
,name_textstyle_opts=opts.TextStyleOpts(font_size=13)
,axislabel_opts=opts.LabelOpts(font_size=10,rotate=15)
)##坐标轴标签的格式配置
,yaxis_opts=opts.AxisOpts(name = '涨幅',position='right'))
bar1.set_series_opts(label_opts=opts.LabelOpts(position='right',color='red',font_size=8))
bar1.reversal_axis()
grid_increase.add(bar1,grid_opts=opts.GridOpts(pos_left="50%",height="100%"))
#换手率，第二个图标
#降幅排序
df_stock_decrease=df_result.sort_values(by=['increaseCloseRate'], ascending=True)
print('df_stock_decrease',df_stock_increase)
df_stock_decrease=df_stock_decrease[0:30]
bar2=Bar(init_opts=opts.InitOpts(theme=ThemeType.WHITE))
x=df_stock_decrease['ts_code'].tolist()
y1=df_stock_decrease["increaseCloseRate"].tolist()
bar2.add_xaxis(x)
bar2.add_yaxis('总跌幅',y1)
bar2.set_global_opts(title_opts=opts.TitleOpts(title="跌幅", subtitle="按跌幅排序")
,xaxis_opts=opts.AxisOpts(name_textstyle_opts=opts.TextStyleOpts(font_size=13)
,axislabel_opts=opts.LabelOpts(font_size=10,rotate=15)
)##坐标轴标签的格式配置
,yaxis_opts=opts.AxisOpts(name = '跌幅'))
bar2.set_series_opts(label_opts=opts.LabelOpts(position='left',color='blue',font_size=8))
bar2.reversal_axis()
grid_increase.add(bar2,grid_opts=opts.GridOpts(pos_right="50%",height="100%"))
#第二个图
grid_turnover = Grid()
#换手率排序
df_turnover_increase=df_result.sort_values(by=['turnover_mean'], ascending=False)
print('df_turnover_increase',df_turnover_increase)
df_turnover_increase=df_turnover_increase[0:30]
bar3=Bar(init_opts=opts.InitOpts(theme=ThemeType.WHITE))
x=df_turnover_increase['ts_code'].tolist()
y1=df_turnover_increase["turnover_mean"].tolist()
bar3.add_xaxis(x)
bar3.add_yaxis('换手率最高',y1)
bar3.set_global_opts(title_opts=opts.TitleOpts(title="换手率", subtitle="按换手最多")
,xaxis_opts=opts.AxisOpts(name_textstyle_opts=opts.TextStyleOpts(font_size=13)
,axislabel_opts=opts.LabelOpts(font_size=10,rotate=15)
)##坐标轴标签的格式配置
,yaxis_opts=opts.AxisOpts(name = '换手率最多',position='right'))
bar3.set_series_opts(label_opts=opts.LabelOpts(position='right',color='red',font_size=8))
bar3.reversal_axis()
grid_turnover.add(bar3,grid_opts=opts.GridOpts(pos_top="50%",pos_left="50%",height="100%"))
df_turnover_decrease=df_result.sort_values(by=['turnover_mean'], ascending=True)
print('df_turnover_decrease',df_turnover_decrease)
df_turnover_decrease=df_turnover_decrease[0:30]
bar4=Bar(init_opts=opts.InitOpts(theme=ThemeType.WHITE))
x=df_turnover_decrease['ts_code'].tolist()
y1=df_turnover_decrease["turnover_mean"].tolist()
bar4.add_xaxis(x)
bar4.add_yaxis('换手率最低',y1)
bar4.set_global_opts(title_opts=opts.TitleOpts(title="换手率", subtitle="按换手率最低")
,xaxis_opts=opts.AxisOpts(name_textstyle_opts=opts.TextStyleOpts(font_size=13)
,axislabel_opts=opts.LabelOpts(font_size=10,rotate=15)
)##坐标轴标签的格式配置
,yaxis_opts=opts.AxisOpts(name = '换手率最低'))
bar4.set_series_opts(label_opts=opts.LabelOpts(position='right',color='blue',font_size=8))
bar4.reversal_axis()
grid_turnover.add(bar4,grid_opts=opts.GridOpts(pos_top="50%",pos_right="50%",height="100%"))
return grid_increase,grid_turnover #返回
grid_increase对应涨跌幅页面,grid_turnover对应换手率排序页面
对应的页面控制跳转及flask启动程序 firstserver.sh
#coding=gbk
'''
Created on 2023-7-2
@author: 13795
'''
from flask import Flask,render_template, request
#from pyecharts.charts import Bar
from pyecharts import options as opts
import util.Uitility as ut
import util.dataProcess as dp
import util.drawChart1 as dw
#from jinja2.utils import markupsafe
import json
app = Flask(__name__)
#def first():
# return "<p>这是我的第一个flask程序!</p>"
@app.route('/mdStat2')
def mdStat1():
#计算个股和板块在一段时间内基本统计信息
data = request.args.to_dict()
return render_template("mdStat2.html", result_json=data)
@app.route("/index2")
def index2():
c = bar_base()
return markupsafe.Markup(c.render_embed())
#return render_template("index.html")
@app.route("/DataStat1", methods=['GET', 'POST'])
def get_dataStat1():
#统计信息
startDate=request.form.get('startDate')
endDate=request.form.get('endDate')
dp1=dp.dataProcess()
if ut.checkDate(startDate,endDate):
df_result=dp1.cal_report(startDate,endDate)
#print('result',df_result)
chart1,chart2=dw.draw_report(df_result)
resultChart={"chart1":chart1.dump_options_with_quotes(),"chart2":chart2.dump_options_with_quotes()}
result=json.dumps(resultChart)
#return chart1.dump_options_with_quotes(),chart2.dump_options_with_quotes()
return result
else:
return 'error date input'
if __name__ == '__main__':
app.run(host='0.0.0.0')
注意返回页面需要ajax提交跳转"/DataStat1"对应的处理函数get_dataStat1()中按json方式拼接 resultChart={“chart1”:chart1.dump_options_with_quotes(),“chart2”:chart2.dump_options_with_quotes()}
而在页面mdStat中 ,需要把获得JSON对象转换为javascript对象，即ch1=$.parseJSON(result[“chart1”])…，否则会报错 ,说明参考
jquery each报 Uncaught TypeError: Cannot use ‘in’ operator to search for错误
<script type="text/javascript">
function getData() { //查询触发的ajax提交和返回处理
$.ajax({
...
success: function (result) {
// console.log(result["chart1"],result["chart2"])
var myChart1 = echarts.init(document.getElementById('tab1'));
var ch1=$.parseJSON(result["chart1"])
myChart1.setOption(ch1);
var myChart2 = echarts.init(document.getElementById('tab2'));
var ch2=$.parseJSON(result["chart2"])
myChart2.setOption(ch2);
},
error: function() {
alert("错误的日期！");
}
});
然后启动访问 localhost:5000/mdStat2
结果