zhoulukuan opened a new issue #15339:  How to read images into gluoncv from zip 
file?
URL: https://github.com/apache/incubator-mxnet/issues/15339
 
 
   I had to read images from the entire zip file because the number of images 
under a folder exceeds the limit of the Linux system.  I used such code
   ```
   import zipfile
   import numpy as np
   from PIL import Image
   import io
   import mxnet as mx
   
   z = zipfile.ZipFile("train.zip", "r")
   data = z.read(z.namelist()[0])
   data = io.BytesIO(data)
   im = Image.open(data)
   im = np.asarray(img)
   im = mx.nd.array(im)
   ```
   It seems that I get the BGR image which is similar with what I get when 
using `mx.image.imread(img_path, 1)` in gluoncv. But I am curious about whether 
such a reading method will encounter some problems when dealing with multiple 
processes. Is the speed very slow? Is there a better way to deal with this 
problem in mxnet?

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