Very basic Python question (strings, formats and escapes)

Question

I am starting to learn Python with an online guide, and I just did an exercise that required me to write this script:

from sys import argv

script, filename = ar         


        

Answer 1

bad

Original code is repetitive, and copy-pasting code is dangerous ( Why is "copy and paste" of code dangerous? ):

print "Now I'm going to ask you for three lines."

line1 = raw_input("line 1: ")
line2 = raw_input("line 2: ")
line3 = raw_input("line 3: ")

print "I'm going to write these to the file."

target.write(line1)
target.write("\n")
target.write(line2)
target.write("\n")
target.write(line3)
target.write("\n")

good

Much shorter, can change it to 4+ lines just by changing one character:

print "Now I'm going to ask you for three lines."

lines = [raw_input("line {i}: ".format(i=i)) for i in range(1,4)]

print "I'm going to write these to the file."

for line in lines:
    target.write(line+'\n')