Python multiprocessing with image pil workers what create images and than save them to a zip file 31.07.19

import multiprocessing
import zipfile
from PIL import Image

def make_picture(self,style,size,return_dict):
    url = '{}/styles/{}'.format(self.cb['host'],style)
    r = requests.get(url,auth=(self.cb['user'],self.cb['pass']))
    if r.status_code == 200:
      picture = r.json()['picture']
      path = '{}{}'.format(self.pic_path,picture)
      if(os.path.isfile(path)):
        img = Image.open(path)
        img.thumbnail(size, Image.ANTIALIAS)
        o = io.BytesIO()
        try:
          img.save(o, format='PNG',dpi=(300,300))
        except Exception as e:
          img = Image.new('RGB',size,'black')
          img.save(o, format='PNG',dpi=(300,300))
        print(o)
        return_dict[style] = o.getvalue()

def make_picture_package(self,styles,filesize,filename,email):
    manager = multiprocessing.Manager()
    return_dict = manager.dict()
    size = (int(filesize),int(filesize))
    filepath = filename
    zf = zipfile.ZipFile(filepath, "w", zipfile.ZIP_DEFLATED)
    jobs = []
    for i in styles:
      p = multiprocessing.Process(target=self.make_picture,args=(i,size,return_dict))
      jobs.append(p)
      p.start()
    for j in jobs:
      j.join()

print('...create zip file')
    for i in return_dict:
      zf.writestr('{}-{}.png'.format(i,filesize),return_dict[i])

return

https://pymotw.com/2/multiprocessing/basics.html

https://stackoverflow.com/questions/10415028/how-can-i-recover-the-return-value-of-a-function-passed-to-multiprocessing-proce

Anonymous

31.07.19

Anonymous

Python multiprocessing with image pil workers what create images and than save them to a zip file 31.07.19

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