She was hungry, & did not recognize your friend's scent as she does yours- she was very "optimistic" that this was dinner, but no, she does not have a taste for human blood now.
You should ALWAYS be aware that your snake "might bite you" but all it takes is paying attention to their body language & telling them (using your scent & touch cues) that it's you, not their dinner.
Snakes can see but they do not identify us visually. However, if you forget that, many snakes will be good enough to remind you.![]()