In Python it's well known that the default iterator on a file gives you the lines. Arguably a function would've been a clearer design, but this is idiomatic in

In Python it's well known that the default iterator on a file gives you the lines. Arguably a function would've been a clearer design, but this is idiomatic in the language we have. As far as map vs. list comprehension, yes, I prefer the comprehension in the cases where map would need lambda. Here that's not the case. Per "as the complexity of the expression to be mapped increases", this expression 'float' is the simplest possible.