1. 函数库导入 # import libraries necessary for this projectimport os, sys, pickleimport numpy as npimport pandas as pdimport matplotlib.pyplot as pltimport matplotlib.dates as mdatesimport seaborn as
一、左半圆效果 <style style="text/css">.coupon {width: 240px;height: 100px;margin-top: 15px;background-color: #ff6347;-webkit-mask: radial-gradient(circle at left center, transparent 20px, red 20px); }</