如何只读取特定字符串后的文本文件中的行？

如何只读取特定字符串后的文本文件中的行？

当您到达要开始的行时，只需开始另一个循环即可：

for files in filepath:    with open(files, 'r') as f:        for line in f: if 'Abstract' in line:          for line in f: # now you are at the lines you want         # do work

文件对象是其自己的迭代器，因此当到达其中的行时，

'Abstract'

我们将从该行继续进行迭代，直到消耗完迭代器为止。

一个简单的例子：

gen = (n for n in xrange(8))for x in gen:    if x == 3:        print('Starting second loop')        for x in gen: print('In second loop', x)    else:        print('In first loop', x)

产生：

In first loop 0In first loop 1In first loop 2Starting second loopIn second loop 4In second loop 5In second loop 6In second loop 7

您还可以使用itertools.dropwhile来消耗所需的行：

from itertools import dropwhilefor files in filepath:    with open(files, 'r') as f:        dropped = dropwhile(lambda _line: 'Abstract' not in _line, f)        next(dropped, '')        for line in dropped:     print(line)