def helper$\_$distance$($coord$1,$ coord$2)$: $"""$ Calculate the Euclidean distance between two points represented by coordinates. Parameters: $-$ coord$1($list of str$)$: Coordinates of the first point as $[$x$1,$ y$1].-$ coord$2($list of str$)$: Coordinates of the second point as $[$x$2,$ y$2].$ Returns: $-$ float: Euclidean distance between the two points. The Euclidean distance $($d$)$ between two points $($x$1,$ y$1)$ and $($x$2,$ y$2)$ is given by: d $=$ sqrt$(($x$1-$ x$2)^2+($y$1-$ y$2)^2)$ Examples: $>>>$ helper$\_$distance$([\text{'}1\text{'},\text{'}2\text{'}],[\text{'}4\text{'},\text{'}6\text{'}])5\mathrm{.}0>>>$ round$($helper$\_$distance$([\text{'}3\text{'},\text{'}2\text{'}],[\text{'}40\text{'},\text{'}6\text{'}]),3)37\mathrm{.}216$ Additional doctests: $>>>$ helper$\_$distance$([\text{'}0\text{'},\text{'}0\text{'}],[\text{'}0\text{'},\text{'}0\text{'}])0\mathrm{.}0>>>$ helper$\_$distance$([\text{'}-1\text{'},\text{'}-2\text{'}],[\text{'}2\text{'},\text{'}4\text{'}])5\mathrm{.}0>>>$ helper$\_$distance$([\text{'}5\text{'},\text{'}10\text{'}],[\text{'}-2\text{'},\text{'}-8\text{'}])18\mathrm{.}384>>>$ helper$\_$distance$([\text{'}0\text{'},\text{'}0\text{'}],[\text{'}-3\text{'},\text{'}-4\text{'}])5\mathrm{.}0>>>$ helper$\_$distance$([\text{'}0\text{'},\text{'}0\text{'}],[\text{'}3\text{'},\text{'}4\text{'}])5\mathrm{.}0>>>$ helper$\_$distance$([\text{'}-5\text{'},\text{'}-5\text{'}],[\text{'}5\text{'},\text{'}5\text{'}])14\mathrm{.}142"""$ x$1,$ y$1=$ map$($float$,$ coord$1)$ x$2,$ y$2=$ map$($float$,$ coord$2)$ distance $=$ math.sqrt$(($x$1-$ x$2)**2+($y$1-$ y$2)**2)$ return distance In this example, I've added three more doctests with different coordinate pairs to showcase the versatility of the function. You can customize the examples based on the specific requirements or behavior of your function.