a +b ?
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From: superpollo on 11 Jun 2010 10:33 Simon Brunning ha scritto: > 2010/6/11 yanhua <gasfans(a)163.com>: >> hi,all！ >> it's a simple question: >> input two integers A and B in a line,output A+B? > > print sum(int(i) for i in raw_input("Please enter some integers: ").split()) LOL
From: Alain Ketterlin on 11 Jun 2010 11:31 yanhua <gasfans(a)163.com> writes: > it's a simple question: > input two integers A and B in a line,output A+B? > > this is my program: > s = input() input() is probably not what you think it is. Check raw_input instead. > t = s.split() > a = int(t[0]) > b = int(t[1]) > print(a+b) > > but i think it's too complex,can anybody tell to slove it with less code. print sum(map(int,raw_input().split())) or replace sum by reduce. BTW, it works with any number of integers You can find this by walking backwards in your code, starting at a+b, and generalizing a little bit on your way. -- Alain.
From: Steven D'Aprano on 11 Jun 2010 11:57 On Fri, 11 Jun 2010 22:11:26 +0800, yanhua wrote: > hi,all！ > it's a simple question: > input two integers A and B in a line,output A+B? > > this is my program: > s = input() > t = s.split() > a = int(t[0]) > b = int(t[1]) > print(a+b) > > but i think it's too complex,can anybody tell to slove it with less > code. Why do you think it is too complex? That seems fine to me. If anything, it is too SIMPLE -- where is the error checking? What if the user only enters one number? Or three numbers? Or something that isn't a number at all? You can't get much simpler than your code -- you take a string, split it, convert the parts into integers, and print the sum. That is very simple. Compare it to this solution posted earlier: (Python 2.x code) import operator print reduce(operator.add, map(int, raw_input().split())) Look at how complex that is! You need to import a module, create a list using map, look up the 'add' attribute on the module, then call reduce on the list. Try explaining that to a new programmer who isn't familiar with map and reduce. And can you imagine how much extra work the computer has to do just to save a couple of lines of code? No, I think your code is very simple. You can save a few lines by writing it like this: s = input('enter two numbers: ') t = s.split() print(int(t[0]) + int(t[1])) # no need for temporary variables a and b but this still has the problem that there is no error checking for bad user input. Fortunately this is Python, where bad input will just raise an exception instead of causing a core dump, but still, this is too simple for anything except quick-and-dirty scripts. -- Steven
From: alex23 on 13 Jun 2010 12:25 Steven D'Aprano <st...(a)REMOVE-THIS-cybersource.com.au> wrote: > No, I think your code is very simple. You can save a few lines by writing > it like this: > > s = input('enter two numbers: ') > t = s.split() > print(int(t[0]) + int(t[1])) # no need for temporary variables a and b Not that we're playing a round of code golf here, but this is a slightly nicer take on your version: one, two = input('enter two numbers: ').split() print(int(one) + int(two)) I like names over subscripts, but that's just me :)
From: exarkun on 13 Jun 2010 12:46
On 04:25 pm, wuwei23(a)gmail.com wrote: >Steven D'Aprano <st...(a)REMOVE-THIS-cybersource.com.au> wrote: >>No, I think your code is very simple. You can save a few lines by >>writing >>it like this: >> >>s = input('enter two numbers: ') >>t = s.split() >>print(int(t[0]) + int(t[1])) # no need for temporary variables a and >>b > >Not that we're playing a round of code golf here, but this is a >slightly nicer take on your version: > >one, two = input('enter two numbers: ').split() >print(int(one) + int(two)) > >I like names over subscripts, but that's just me :) Fore! print(sum(map(int, input('enter two numbers: ').split()))) Jean-Paul |