I'm sometimes tempted to use it in loops, when for x in map(func, iterable): ... is cleaner than for x in (func(y) for y in iterable): ... a

I'm sometimes tempted to use it in loops, when for x in map(func, iterable): ... is cleaner than for x in (func(y) for y in iterable): ... and shorter than for y in iterable: x = func(y) ... But that mostly only makes sense if you already have a suitable named function (e.g. str), and I usually end up going with the third variant anyway. There's an analogous case with filter and `if not cond: continue`. map and filter calls are trivially rewritten to generator expressions, but it's not necessarily an improvement.