from the article: "The snake in this picture had eaten a full grown Impala ewe and, sadly, caught itself in an electric fence."
the guy just forgot to mention that he didnt kill it.
i mean, why wouldhe consider it 'sad' if he didnt give a shit
and just murdered the snake. obviously he's not a journalist
and didnt think to explain further.
maybe it has a greater capacity to withstand electricity, but its still going to die from prolonged exposure like that.