python如何同时保存两行

[onizuka0912]

source = 'E:\\1.txt'
f = file(source)
t = file('E:\\2.txt', 'w')
while True:
line = f.readlines()
if len(line) == 0:
break
elif 'asdf' in line:
t.writelines(line)

1.txt中的数据情况：
123123123 asdf
324234234
123123123 asdf
234234234
123123123 werwer
423423423
123123123 asdf
234234234
...
其中两行数据是一组，我希望将adsf和werwer两种数据分开保存，奇数行可以用asdf和werwer区分，可是偶数行要如何得到呢？

[maplele20]

>>> f = open('b.txt')
>>> lines = f.readlines()
>>> ta = open('b.txt', 'w')
>>> tb = open('c.txt', 'w')
>>> for i in xrange(0, len(lines), 2):
... 	if 'asdf' in lines[i]:
... 		ta.writelines(lines[i:i+2])
... 	elif 'werwer' in lines[i]:
... 		tb.writelines(lines[i:i+2])
... 		
>>> ta.close()
>>> tb.close()

[angelo23]

file可以直接iterate
for cnt, line in enumerate(open('1.txt')):
if cnt % 2: # odd
doSomething
else:
doSomethingElse

[boyz2men]

抬杠版

[open('1.txt','aw').write(row) if indx%2 else open('2.txt','aw').write(row) for indx,row in enumerate(open('otest.txt'))]