python下载卫星云图合成gif的方法示例

#http库
import requests
 
#准备http请求头
headers = {"user-agent": "firefox"}
#中央气象台卫星云图网页
url = 'http://www.nmc.cn/publish/satellite/fy2.htm'
#获取网页
r = requests.get(url, headers=headers)
#改编码方式支持中文
r.encoding='utf-8'
#保存为文本
with open('response.txt','w', encoding='utf-8') as f:
 f.write(r.text)

src=http://image.nmc.cn/product/2020/02/16/WXCL/medium/SEVP_NSMC_WXCL_ASC_E99_ACHN_LNO_PY_20200216091500000.JPG?v=1581844610745

#html/xml解析库
from lxml import etree
 
#解析response
html = etree.HTML(r.text)
result = html.xpath('//script[@type="text/javascript"]/text()')[2]
print(result)

#正则库
import re
 
urls = re.findall('/product.*.JPG', result)
print(urls)

def getpage(page):
 try:
  r = requests.get(page, headers=headers)
  html = etree.HTML(r.text)
  result = html.xpath('//script[@type="text/javascript"]/text()')[2]
  urls = re.findall('/product.*.JPG', result)
  return urls
 except Exception as e:
  print(e)

#url前缀
base_url = 'http://image.nmc.cn'
def dlpic(urls):
 # 定义一个文件名称收集列表
 filenames = []
 for item in urls:
  r = requests.get(base_url + item, headers)
  #文件名就是用斜杠把字符串分隔，取走后后一个字符串
  filename = item.split('/')[-1]
  filenames.append(filename)
  #保存图片
  with open('wxyt_pic\\' + filename, 'wb') as f:
   f.write(r.content)
  print('已下载：'+item)
 #返回文件名称列表，用于合成gif
 return filenames

# 图片操作库
import imageio
 
def makegif(images):
 # 创建空列表，把图片明反序
 frames = []
 images.reverse()
 # 加载12张图片
 for item in images:
  frames.append(imageio.imread('wxyt_pic\\'+item))
 # 合成1张gif
 imageio.mimsave('hecheng.gif', frames, 'GIF', duration=1)

def playgif(seq=0):
 if set == 0:
  #播放12张合成好的gif
  animation = pyglet.resource.animation('hecheng.gif')
 else:
  pyglet.resource.path = ['wxyt_pic']
  la = os.listdir('wxyt_pic')
  images = []
  for n in la:
   images.append(pyglet.resource.image(n))
  #播放库存中的所有照片
  animation = pyglet.image.Animation.from_image_sequence(images, period=0.5, loop=True)
 #显示动画
 sprite = pyglet.sprite.Sprite(animation)
 windows = pyglet.window.Window(width=sprite.width, height=sprite.height)
 @windows.event
 def on_draw():
  windows.clear()
  sprite.draw()
 pyglet.app.run()

import requests
from lxml import etree
import imageio
import re
import pyglet
import os
 
 
# 在脚本同目录下，新建一个文件夹，存储当天12张图
def ckdir():
 if os.path.exists('wxyt_pic') == False:
  os.mkdir('wxyt_pic')
 
 
# 获取图片url列表
def getpage(page):
 try:
  r = requests.get(page, headers=headers)
  html = etree.HTML(r.text)
  result = html.xpath('//script[@type="text/javascript"]/text()')[2]
  urls = re.findall('/product.*.JPG', result)
  return urls
 except Exception as e:
  print(e)
 
 
# 下载图片
def dlpic(urls):
 filenames = []
 for item in urls:
  r = requests.get(base_url + item, headers)
  filename = item.split('/')[-1]
  filenames.append(filename)
  with open('wxyt_pic\\' + filename, 'wb') as f:
   f.write(r.content)
  print('已下载：'+item)
 return filenames
 
 
# 制作gif
def makegif(images):
 frames = []
 images.reverse()
 for item in images:
  frames.append(imageio.imread('wxyt_pic\\'+item))
 imageio.mimsave('hecheng.gif', frames, 'GIF', duration=1)
 
 
# 播放gif
def playgif(seq=0):
 if set == 0:
  #播放12张合成好的gif
  animation = pyglet.resource.animation('hecheng.gif')
 else:
  pyglet.resource.path = ['wxyt_pic']
  la = os.listdir('wxyt_pic')
  images = []
  for n in la:
   images.append(pyglet.resource.image(n))
  #播放库存中的所有照片
  animation = pyglet.image.Animation.from_image_sequence(images, period=0.5, loop=True)
 #显示动画
 sprite = pyglet.sprite.Sprite(animation)
 windows = pyglet.window.Window(width=sprite.width, height=sprite.height)
 @windows.event
 def on_draw():
  windows.clear()
  sprite.draw()
 pyglet.app.run()
 
 
# init
if __name__ == '__main__':
 base_url = 'http://image.nmc.cn'
 page = 'http://www.nmc.cn/publish/satellite/fy2.htm'
 headers = {"user-agent": "firefox"}
 ckdir()
 urls = getpage(page)
 images = dlpic(urls)
 makegif(images)
 # 0只播放今天12张，1播放库存里所有照片
 playgif(1)