`dlc-live-test` works on Linux only

[eggplants]

On windows Powershell, tar.exe raises error tar.exe: Error opening archive: Failed to open '\\.\tape0'.

This kind of code is compatibile:

import os

os.system(f'curl -O "{model_url}"')
os.system(f'tar xzf "{url_basename}"')
os.system(f'rm "{url_basename}"')

[MMathisLab]

HI @eggplants thanks! But I can confirm out code is used/tested on Windows10 (even in my own lab :). So curious more about what caused this error - can you elaborate on your setup/system?

[eggplants]

tar.exe error has raised on the lab PC, Windows10 and Powershell 7.1.3 with Windows Terminal.
(I can't use the terminal in the lab right now, so I will post the log when I run it again later.)
On the other hand, dlc-live-test worked without error on my Ubuntu Desktop 21.04.
Also, Curl seems to be faster to download and save the file once than to pipe it through. (because of the buffering for the pipe?)

[AlexEMG]

I suppose this depends on the terminal you use in Windows (probably you use gitbash, @MMathisLab). But I guess @eggplants's solution applies more broadly.

[sneakers-the-rat]

The most cross-platform thing to do would probably be to use python stdlib (urllib and tarfile) instead of relying on system libs (which, as you note, may or not be present on a given machine). I actually fixed this in #60 along with a few other quirks of the check_install.py script.

My approach was to do it like this (full code in PR):

# download dog test video from github:
print(f"Downloading Video to {video_file}")
url_link = "https://github.com/DeepLabCut/DeepLabCut-live/blob/master/check_install/dog_clip.avi?raw=True"
urllib.request.urlretrieve(url_link, video_file, reporthook=urllib_pbar)

# download exported dog model from DeepLabCut Model Zoo
if Path(model_tarball).exists():
    print('Tarball already downloaded, using cached version')
else:
    print("Downloading full_dog model from the DeepLabCut Model Zoo...")
    model_url = "http://deeplabcut.rowland.harvard.edu/models/DLC_Dog_resnet_50_iteration-0_shuffle-0.tar.gz"
    urllib.request.urlretrieve(model_url, str(model_tarball), reporthook=urllib_pbar)

print('Untarring compressed model')
model_file = tarfile.open(str(model_tarball))
model_file.extractall(str(model_dir.parent))
model_file.close()

Seems like this was closed, but it does seem like a compatibility issue since I imaging there will be lots of folks using default windows command prompt