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May. 23, 2018
Jan. 28, 2018

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PyTorch Deep Learning Toolbox

PyDLT is a set of tools aimed to make experimenting with PyTorch easier (than it already is).

Full Documentation here..


  • Trainers (currently supporting Vanilla, VanillaGAN, WGAN-GP, BEGAN, FisherGAN)
trainer = dlt.train.VanillaGANTrainer(generator, discriminator, g_optim, d_optim)
for batch, (prediction, losses) in trainer(data_loader):
    # Training happens in the iterator and relevant results are returned for each step
  • Built in configurable parser with arguments.
opt = dlt.config.parse() # Has built in options (can add extra)
print('Some Settings: ', opt.experiment_name, opt.batch_size,
  • Configuration files support and parser compatible functions.
$ python @settings.cfg
Some Settings:  config_test 32 0.0001
  • HDR imaging support (.hdr, .exr, and .pfm formats)
img = dlt.hdr.imread('test.pfm')
dlt.hdr.imwrite('test.exr', img)
  • Checkpointing of (torch serializable) objects; Network state dicts supported.
data_chkp = Checkpointer('data')[1,2,3]))
a = data_chkp.load()
  • Image operations and easy conversions between multiple library views (torch, cv, plt)
img = cv2.imread('image.jpg') # Height x Width x Channels - BGR
dlt.viz.imshow(img, view='cv')  # Height x Width x Channels - RGB
tensor_with_torch_view = cv2torch(img) # Channels x Height x Width - RGB
  • Easy visualization (and make_grid supporting Arrays, Tensors, Variables and lists)
for batch, (prediction, loss) in trainer(loader):
    grid = dlt.util.make_grid([ batch[0], batch[1], prediction], size(3, opt.batch_size))
    dlt.viz.imshow(grid, pause=0.01, title='Training Progress')
  • Parameter and input/outputs/gradients layer visualization.
net = nn.Sequential(nn.Linear(10, 10))
dlt.viz.modules.forward_hook(net, [nn.Linear], tag='layer_outputs', histogram=False)
  • CSV Logger.
log = dlt.util.Logger('losses', ['train_loss', 'val_loss'])
log({'train_loss': 10, 'val_loss':20})
  • Command line tool for easy plotting of CSV files (with live updating).
$ dlt-plot --file losses.csv train_loss val_loss --refresh 5 --loglog True --tail 100
  • A minimal Progress bar (with global on/off switch).
from dlt.util import barit
barit.silent = False # Default is False
for batch in barit(loader, start='Loading'):


Make sure you have PyTorch installed. OpenCV is also required:

conda install -c menpo opencv

conda install (recommended):

conda install -c demetris pydlt

From source:

git clone
cd pydlt
python install


I created this toolbox while learning Python and PyTorch, after working with (Lua) Torch, to help speed up experiment prototyping.

If you notice something is wrong or missing please do a pull request or open up an issue.


Demetris Marnerides: [email protected]