如何在一行中以单行（n1和n2）打印两个for循环输出

Question

fhand=open(file)
n2=0
for line in fhand:
    if line .startswith("1/15/2014"):
        n2=n2+1
    print n2
n1=0
for line in fhand:
    n1=n1+1
    print n1

Answer 1

循环非常相似;只需将代码放在另一个内：

for line in fhand:
    n1 += 1
    if line.startswith("1/15/2014"):
        n2 += 1
    print n2, n1

正如danidee所提到的，打开文件时应始终使用with：

with open(file) as fhand:
    for line in fhand:
        n1 += 1
        if line.startswith("1/15/2014")
            n2 += 1
        print n2, n1