In one manual I saw a similar installation pip install torch torchvision which has a space between the last two words. But I can't use this in requirements.txt If I have the contents of the requirements.txt file: torch torchvision opencv-python Tables Then when pip install -r requirements.txt is called, it causes an error: ERROR: Invalid requirement: 'torch torchvision' (from line 1 of requirements.txt) I assume there is a different kind of torch torchvision entry Continue reading...