from PIL import Image, ImageFilter
# 打开一个jpg图像文件，注意是当前路径:
im = Image.open('test.jpg')
#获取图片大小
w,h = im.size
print('Original image size : width:%d height: %d' %(w,h))

#图片缩放
im.thumbnail((w//2, h//2))

print('Resize image to: %dx%d' % (w//2, h//2))
# 把缩放后的图像用jpeg格式保存:
im.save('test2.jpg', 'jpeg')


# 打开一个jpg图像文件，注意是当前路径:
im = Image.open('test.jpg')
# 应用模糊滤镜:
im2 = im.filter(ImageFilter.BLUR)
im2.save('blur.jpg', 'jpeg')

im2 = im.filter(ImageFilter.CONTOUR)
im2.save('contour.jpg','jpeg')

USER_AGENT = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.221 Safari/537.36 SE 2.X MetaSr 1.0'
PATTERN1 = r'<div id="content">.*?<h2>(.*?)</h2>'                
PATTERN2 = r'<p><img src="(.*?)"'
PATTERN2 = r'<p><img class=".*?src="(.*?)"'
PATTERN3 = r'''<li class='next-page'><a target="_blank" href='(.*?)'>下一页'''
PATTERN4 = r'^(.*)/'
PATTERN5 = r'^.*/(.*?)$'

from urllib import request, parse
from urllib import error
page = 1
url = 'https://www.qiushibaike.com/hot/page/'+str(page)
user_agent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.221 Safari/537.36 SE 2.X MetaSr 1.0'
try:
	req = request.Request(url)
	req.add_header('User-Agent', user_agent)
	response = request.urlopen(req)
	#bytes变为字符串
	content = response.read().decode('utf-8')
	print(type(content))
	#uf-8编码方式打开
	file = open('file.txt', 'w',encoding='utf-8')

	file.write(content)
	
except error.URLError as e:
	if hasattr(e,'code'):
		print (e.code)
	if hasattr(e,'reason'):
		print (e.reason)
finally:
	file.close()

from datetime import datetime
now = datetime.now()
print(now)
print(type(now))

from multiprocessing import Process
import os

def processFunc(name):
	print("child process is %s, pid is %s"  %(name, os.getpid() ) )
	return
if __name__ == '__main__':
	print("Parent process is %s." %(os.getpid() ))
	p = Process(target = processFunc, args = ('test', ))
	print('Child will start ')
	p.start()
	p.join()
	print("Child stop")