python下載衛(wèi)星云圖合成gif的方法示例

#http庫(kù)
import requests
 
#準(zhǔn)備http請(qǐng)求頭
headers = {"user-agent": "firefox"}
#中央氣象臺(tái)衛(wèi)星云圖網(wǎng)頁(yè)
url = 'http://www.nmc.cn/publish/satellite/fy2.htm'
#獲取網(wǎng)頁(yè)
r = requests.get(url, headers=headers)
#改編碼方式支持中文
r.encoding='utf-8'
#保存為文本
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解析庫(kù)
from lxml import etree
 
#解析response
html = etree.HTML(r.text)
result = html.xpath('//script[@type="text/javascript"]/text()')[2]
print(result)

#正則庫(kù)
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前綴
base_url = 'http://image.nmc.cn'
def dlpic(urls):
 # 定義一個(gè)文件名稱收集列表
 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，取走后后一個(gè)字符串
  filename = item.split('/')[-1]
  filenames.append(filename)
  #保存圖片
  with open('wxyt_pic\\' + filename, 'wb') as f:
   f.write(r.content)
  print('已下載：'+item)
 #返回文件名稱列表，用于合成gif
 return filenames

# 圖片操作庫(kù)
import imageio
 
def makegif(images):
 # 創(chuàng)建空列表，把圖片明反序
 frames = []
 images.reverse()
 # 加載12張圖片
 for item in images:
  frames.append(imageio.imread('wxyt_pic\\'+item))
 # 合成1張gif
 imageio.mimsave('hecheng.gif', frames, 'GIF', duration=1)

def playgif(seq=0):
 if set == 0:
  #播放12張合成好的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))
  #播放庫(kù)存中的所有照片
  animation = pyglet.image.Animation.from_image_sequence(images, period=0.5, loop=True)
 #顯示動(dòng)畫
 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
 
 
# 在腳本同目錄下，新建一個(gè)文件夾，存儲(chǔ)當(dāng)天12張圖
def ckdir():
 if os.path.exists('wxyt_pic') == False:
  os.mkdir('wxyt_pic')
 
 
# 獲取圖片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)
 
 
# 下載圖片
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('已下載：'+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張合成好的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))
  #播放庫(kù)存中的所有照片
  animation = pyglet.image.Animation.from_image_sequence(images, period=0.5, loop=True)
 #顯示動(dòng)畫
 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張，1播放庫(kù)存里所有照片
 playgif(1)