omerasif57

When QuerySets are evaluated

You can concatenate as many filters as you like to a QuerySet, and you will not hit the database until the QuerySet is evaluated. QuerySets are only evaluated in the following cases:

    The first time you iterate over them
    When you slice them, for instance, Post.objects.all()[:3]
    When you pickle or cache them
    When you call repr() or len() on them
    When you explicitly call list() on them

omerasif57

from multiprocessing.pool import ThreadPool
from time import time

import wget

urlp = "https://picsum.photos/id/{}/720/1200"

urls = [(urlp.format(x), "{}.jpg".format(x)) for x in range(10)]

omerasif57

Future<Null> _downloadNetworkImage() async {
    Dio dio = Dio();
    try {
      var dir = await getTemporaryDirectory();
      print(dir);

      Scaffold.of(context).showSnackBar(
          SnackBar(content: Text("Downloading image. Please wait...")));
      await dio.download(url, '${dir.path}/image.jpeg',
          onReceiveProgress: (rec, total) {

omerasif57

bottomNavigationBar: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Container(
          decoration: BoxDecoration(boxShadow: [
            BoxShadow(
              blurRadius: 4.0,
              offset: Offset(0.0, 0.0),
              color: Colors.grey,
            ),
          ], borderRadius: BorderRadius.circular(36.0)),