Das deutsche Python-Forum

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Journal=open('J_15April.txt')

jrn=Journal.read()

Zeile=jrn.split('14.04.2015')


for line in Zeile:
    if 'BON' in line:
        
        print(line)

Code: Alles auswählen

with open('J_15April.txt') as journal:
    for line in journal:
        if 'BON' in line:
            print(next(journal))

Code: Alles auswählen

with open('J_15April.txt') as journal:
    for line in journal:
        if 'BON' in line:
            print(line)

Code: Alles auswählen

#!/usr/bin/env python
from __future__ import absolute_import, division, print_function
from collections import deque
from itertools import islice


def iter_window(iterable, window_length):
    items = iter(iterable)
    window = deque(islice(items, window_length - 1), window_length)
    for item in iterable:
        window.append(item)
        yield list(window)


def main():
    with open('test.txt') as lines:
        for line, next_line in iter_window(lines, 2):
            if 'BON' in line:
                print(next_line)


if __name__ == '__main__':
    main()

Code: Alles auswählen

from itertools import tee

def get_lines(infile, key):
    line_iters = tee(infile)
    try:
        next(line_iters[1])
    except StopIteration:
        return
    for line, next_line in zip(*line_iters):
        if key in line:
            yield next_line

def main():
    with open('J_15April.txt') as infile:
        lines = get_lines(infile, 'BON')
        print('\n'.join(lines))

if __name__ == '__main__':
    main()

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...
            if 'BON' in line and 'BON' not in next_line:
                print(next_line)

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BON
BON
Treffer
BON
BON
BON
Treffer

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BON
Treffer
BON
BON
Treffer

Code: Alles auswählen

Treffer
Treffer