AutoModelForSequenceClassification requires the PyTorch library but it was not found in your environment
I am trying to use the roberta transformer and a pre-trained model but I keep getting this error:
    ImportError: 
AutoModelForSequenceClassification requires the PyTorch library but it was not found in your environment. Checkout the instructions on the
installation page: https://pytorch.org/get-started/locally/ and follow the ones that match your environment.

Here's my code:
# Tasks:
# emoji, emotion, hate, irony, offensive, sentiment
# stance/abortion, stance/atheism, stance/climate, stance/feminist, stance/hillary

task='sentiment'
MODEL = f&quot;cardiffnlp/twitter-roberta-base-{task}&quot;

tokenizer = AutoTokenizer.from_pretrained(MODEL)
# download label mapping
labels=[]
mapping_link = f&quot;https://raw.githubusercontent.com/cardiffnlp/tweeteval/main/datasets/{task}/mapping.txt&quot;
model = AutoModelForSequenceClassification.from_pretrained(MODEL)
model.save_pretrained(MODEL)
labels=[]
mapping_link = f&quot;https://raw.githubusercontent.com/cardiffnlp/tweeteval/main/datasets/{task}/mapping.txt&quot;
with urllib.request.urlopen(mapping_link) as f:
    html = f.read().decode('utf-8').split(&quot;\n&quot;)
    csvreader = csv.reader(html, delimiter='\t')
labels = [row[1] for row in csvreader if len(row) &gt; 1]

I made sure that PyTorch is installed and working:


I was having the same issue. It was solved for me by restarting the kernel.
