[Python-Dev] Use for enumerate()
Greg Ball
gball@cfa.harvard.edu
2002年4月26日 23:13:41 -0400 (EDT)
On 2002年4月26日, Guido van Rossum wrote:
> def getline(filename, lineno):
> if lineno < 1:
> return ''
> lineno -= 1
> f = open(filename)
> for i, line in enumerate(f):
> if i == lineno:
> break
> else:
> line = ''
> f.close()
> return line
>>> Challenge 2: do it with less code.
def getline(filename, lineno):
if lineno < 1:
return ''
f = open(filename)
for line in f:
lineno -= 1
if not lineno:
break
else:
line = ''
f.close()
return line
--
Greg Ball