Python實現(xiàn)疫情地圖可視化

更新時間：2021年02月05日 10:57:58 作者：TrainingL

這篇文章主要介紹了Python如何實現(xiàn)疫情地圖可視化，幫助大家更好的理解和使用python，感興趣的朋友可以了解下

一、 json模塊

JSON（JavaScript Object Notation）是一種輕量級的數(shù)據(jù)交換格式，易于閱讀和編寫，同時也易于機器解析和生成，并有效地提升網(wǎng)絡傳輸效率。

json.loads()：將json格式的str轉化成python的數(shù)據(jù)格式；
json.loads()：將python的數(shù)據(jù)格式（字典或列表）轉化成json格式；

# 如何將json數(shù)據(jù)解析成我們所熟悉的Python數(shù)據(jù)類型？
import json
# 將json格式的str轉化成python的數(shù)據(jù)格式：字典
dic = json.loads('{"name":"Tom","age":23}')
res = json.loads('["name","age","gender"]')
print(f'利用loads將json字符串轉化成Python數(shù)據(jù)類型{dic}',type(dic))
print(f'利用loads將json字符串轉化成Python數(shù)據(jù)類型{res}',type(res))

dics = {"name":"Tom","age":23}
result = json.dumps(dics)
print(type(result))
result

二、通過Python實現(xiàn)疫情地圖可視化

需求：爬取疫情的數(shù)據(jù)、如何處理json數(shù)據(jù)以及根據(jù)疫情數(shù)據(jù)如何利用pyecharts繪制疫情地圖。

1.數(shù)據(jù)的獲取(基于request模塊)

import requests
import json
# 國內疫情數(shù)據(jù)
China_url = 'https://view.inews.qq.com/g2/getOnsInfo?name=disease_h5'
headers = {
 # 瀏覽器偽裝
 'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36',
 'referer': 'https://news.qq.com/',
}
# 發(fā)起get請求，獲取響應數(shù)據(jù)
response = requests.get(China_url,headers=headers).json()
data = json.loads(response['data'])
# 保存數(shù)據(jù)
with open('./2021-02-03國內疫情.json','w',encoding='utf-8') as f:
 # 不采用ASCII編碼
 f.write(json.dumps(data,ensure_ascii=False,indent=2))

爬取的數(shù)據(jù)保存格式為json，開頭的部分數(shù)據(jù)如下：

2.將json格式的數(shù)據(jù)保存到Excel

無論是json數(shù)據(jù)存儲的，還是Python的基本數(shù)據(jù)類型存儲的，對于數(shù)據(jù)分析都不是很友好，所以我們可以將其數(shù)據(jù)存儲類型轉化為pandas的DataFrame類型，因為DataFrame和Excel可以更好的相互轉換。

生成的數(shù)據(jù)模式如下：

將以上的數(shù)據(jù)進行處理，獲得Excel表一樣規(guī)范的數(shù)據(jù)格式。

import pandas as pd
chinaTotalData = pd.DataFrame(china_citylist)

# 將整體數(shù)據(jù)chinaTotalData中的today和total數(shù)據(jù)添加到DataFrame中
# 處理total字典里面的各個數(shù)據(jù)項
# ======================================================================
confirmlist = []
suspectlist = []
deadlist = []
heallist = []
deadRatelist = []
healRatelist = []
# print(chinaTotalData['total'].values.tolist()[0])
for value in chinaTotalData['total'].values.tolist():
 confirmlist.append(value['confirm'])
 suspectlist.append(value['suspect'])
 deadlist.append(value['dead'])
 heallist.append(value['heal'])
 deadRatelist.append(value['deadRate'])
 healRatelist.append(value['healRate'])

chinaTotalData['confirm'] = confirmlist
chinaTotalData['suspect'] = suspectlist
chinaTotalData['dead'] = deadlist
chinaTotalData['heal'] = heallist
chinaTotalData['deadRate'] = deadRatelist
chinaTotalData['healRate'] = healRatelist
# ===================================================================
# 創(chuàng)建全國today數(shù)據(jù)
today_confirmlist = []
today_confirmCutslist = []
for value in chinaTotalData['today'].values.tolist():
 today_confirmlist.append(value['confirm'])
 today_confirmCutslist.append(value['confirmCuts'])

chinaTotalData['today_confirm'] = today_confirmlist
chinaTotalData['today_confirmCuts'] = today_confirmCutslist
# ==================================================================
# 刪除total、today兩列
chinaTotalData.drop(['total','today'],axis=1,inplace=True)
chinaTotalData.head()
# 將其保存到Excel中
chinaTotalData.to_excel('2021-02-03國內疫情.xlsx',index=False)

處理好的數(shù)據(jù)結構如下表：

3.應用pyecharts進行數(shù)據(jù)可視化

pyecharts是一款將python與echarts結合的強大的數(shù)據(jù)可視化工具。繪制出來的圖比Python的Matplotlib簡單美觀。使用之前需要在Python環(huán)境中按照pycharts。在終端中輸入命令：pip install pyecharts

利用pyecharts繪制疫情地圖
根據(jù)上面的疫情數(shù)據(jù)，我們可以利用其畫出全國的疫情地圖
在繪制前，我們需要安裝echarts的地圖包（可根據(jù)不同的地圖需求進行安裝）

pip install echarts-countries-pypkg
pip install echarts-china-provinces-pypkg
pip install echarts-china-cities-pypkg
pip install echarts-china-misc-pypkg
pip install echarts-china-countries-pypkg
pip install echarts-united-kingdom-pypkg

# 導入對應的繪圖工具包
import pandas as pd
from pyecharts import options as opts
from pyecharts.charts import Map

df = pd.read_excel('./2021-02-03國內疫情.xlsx')
# 1.根據(jù)繪制國內總疫情圖（確診）
data = df.groupby(by='province',as_index=False).sum()
data_list = list(zip(data['province'].values.tolist(),data['confirm'].values.tolist()))
# 數(shù)據(jù)格式[(黑龍江,200),(吉林,300),...]

def map_china() -> Map:
 c = (
  Map()
  .add(series_name="確診病例",data_pair=data_list,maptype='china')
  .set_global_opts(
   title_opts = opts.TitleOpts(title='疫情地圖'),
   visualmap_opts=opts.VisualMapOpts(is_piecewise=True,
     pieces = [{"max":9, "min":0, "label":"0-9","color":"#FFE4E1"},
       {"max":99, "min":10, "label":"10-99","color":"#FF7F50"},
       {"max":499, "min":100, "label":"100-4999","color":"#F08080"},
       {"max":999, "min":500, "label":"500-999","color":"#CD5C5C"},
       {"max":9999, "min":1000, "label":"1000-9999","color":"#990000"},
       {"max":99999, "min":10000, "label":"10000-99999","color":"#660000"},]
   )
  )
 )
 return c

d_map = map_china()
d_map.render("mapEchrts.html")

最終的運行效果如下：