first_code.py

import os
ls = os.linesep
while True:
    fname = raw_input('Enter file name');
    if os.path.exists(fname):
        print '%s  exist' % fname
    else:
        break

all = []
print "\n Enter lines but (. quit)\n"
while True:
    entry = raw_input(' >')
    if entry == "." :
        break
    else :
        all.append(entry)

fobj = open(fname,'w')
#fobj.write('\n'.join(all))
fobj.writelines(['%s%s' % (x, ls) for x in all])
fobj.close()
print 'DONE'

type(42)