/Python/Generate-thumbnails-in-django-with-pil

Generate-thumbnails-in-django-with-pil

from django.db import models
from my.images import make_thumbnail


class Image(models.Model):
    image = models.ImageField(upload_to='')
    thumbnail = models.ImageField(upload_to='', editable=False)
    icon = models.ImageField(upload_to='', editable=False)

    def save(self, *args, **kwargs):
        # save for image
        super(Image, self).save(*args, **kwargs)

        make_thumbnail(self.thumbnail, self.image, (200, 200), 'thumb')
        make_thumbnail(self.icon, self.image, (100, 100), 'icon')

        # save for thumbnail and icon
        super(Image, self).save(*args, **kwargs)

Source: stackoverflow.com

Generate-thumbnails-in-django-with-pil

from django.core.files.base import ContentFile
import os.path
from PIL import Image
from io import BytesIO


def make_thumbnail(dst_image_field, src_image_field, size, name_suffix, sep='_'):
    """
    make thumbnail image and field from source image field

    @example
        thumbnail(self.thumbnail, self.image, (200, 200), 'thumb')
    """
    # create thumbnail image
    image = Image.open(src_image_field)
    image.thumbnail(size, Image.ANTIALIAS)

    # build file name for dst
    dst_path, dst_ext = os.path.splitext(src_image_field.name)
    dst_ext = dst_ext.lower()
    dst_fname = dst_path + sep + name_suffix + dst_ext

    # check extension
    if dst_ext in ['.jpg', '.jpeg']:
        filetype = 'JPEG'
    elif dst_ext == '.gif':
        filetype = 'GIF'
    elif dst_ext == '.png':
        filetype = 'PNG'
    else:
        raise RuntimeError('unrecognized file type of "%s"' % dst_ext)

    # Save thumbnail to in-memory file as StringIO
    dst_bytes = BytesIO()
    image.save(dst_bytes, filetype)
    dst_bytes.seek(0)

    # set save=False, otherwise it will run in an infinite loop
    dst_image_field.save(dst_fname, ContentFile(dst_bytes.read()), save=False)
    dst_bytes.close()

Source: stackoverflow.com

Similar codes

1 vote206 views1 answer
Den pfad der python datei rausfinden
Python
1 vote206 views1 answer
Python condition if dataype
Python
97 votes217 views6 answers
How to read files in python
Python
73 votes208 views6 answers
Matplotlib
Python
0 vote224 views1 answer
Como leer lineas de un archivo de texto en python
Python
3 votes202 views1 answer
Local testing server Python
Python
0 vote219 views1 answer
Python [:-1]
Python
4 votes227 views3 answers
How to write to an output file in pytion
Python
0 vote208 views1 answer
Dataframe python unique values rows
Python
0 vote211 views2 answers
How to make a gui with kivy
Python