Hello, I'm just reading the latest edition of Python Cookbook, where it says in Recipe 4.2:
"when the op you wanna perform on each item is to call a function on the item and use the function's result, use L1 = map(f, L), rather than L1 = (f(x) for x in L)" What is wrong with the generator expression (or maybe it is list comprehension, I cannot remember now whether they used [] or () in the book)? Is it for clarity? I'm a newbie, and to me, the generator/comprehension looks _way_ more clearer than map(f, L). Are there any performance/memory requirements I'm not aware of? Why would one want to use map() when there's already an expression that is so clear and easy to understand? Thanks! Ray -- http://mail.python.org/mailman/listinfo/python-list
