python - 如何连续读取细节 block 并计算文本行数

标签 python python-2.7

是否可以在这段代码中添加一个 while 循环？因此它可以连续获取行 block ，直到它仍然可以看到开始和结束单词。

with open('test.txt') as input_data:
    for line in input_data:
        if line.strip() == 'Start': 
            break
    for line in input_data: 
        if line.strip() == 'End':
            break
        print line

如果您要基于我的文本文件，我需要获取从 VIDEO 字符串开始直到 AUDIO 字符串的数据。然后从 AUDIO 到 MKV。它应该持续到文件末尾。这是我的文件的示例。

*****START OF YOUTUBE*****
VIDEO

[download]   0.0% of 5.30MiB at 188.75KiB/s ETA 00:29
[download]   0.1% of 5.30MiB at 474.99KiB/s ETA 00:11
[download]   0.1% of 5.30MiB at 984.97KiB/s ETA 00:05
[download]   0.3% of 5.30MiB at  1.85MiB/s ETA 00:02
[download]   0.6% of 5.30MiB at 896.97KiB/s ETA 00:06
[download]   1.2% of 5.30MiB at 888.54KiB/s ETA 00:06
[download]   2.3% of 5.30MiB at 1006.45KiB/s ETA 00:05
[download]   4.7% of 5.30MiB at 916.41KiB/s ETA 00:05
[download]   9.4% of 5.30MiB at 863.70KiB/s ETA 00:05
[download]  18.9% of 5.30MiB at 847.73KiB/s ETA 00:05
[download]  34.2% of 5.30MiB at 843.72KiB/s ETA 00:04
[download]  49.7% of 5.30MiB at 840.54KiB/s ETA 00:03
[download]  65.0% of 5.30MiB at 839.77KiB/s ETA 00:02
[download]  80.5% of 5.30MiB at 839.71KiB/s ETA 00:01
[download]  95.9% of 5.30MiB at 839.39KiB/s ETA 00:00
[download] 100.0% of 5.30MiB at 842.74KiB/s ETA 00:00
[download] 100% of 5.30MiB in 00:06
AUDIO

[download]   0.0% of 2.99MiB at 112.61KiB/s ETA 00:27
[download]   0.1% of 2.99MiB at 311.43KiB/s ETA 00:09
[download]   0.2% of 2.99MiB at 682.19KiB/s ETA 00:04
[download]   0.5% of 2.99MiB at  1.32MiB/s ETA 00:02
[download]   1.0% of 2.99MiB at 943.80KiB/s ETA 00:03
[download]   2.1% of 2.99MiB at  1.17MiB/s ETA 00:02
[download]   4.1% of 2.99MiB at  1.31MiB/s ETA 00:02
[download]   8.3% of 2.99MiB at  1.59MiB/s ETA 00:01
[download]  16.7% of 2.99MiB at  1.37MiB/s ETA 00:01
[download]  33.4% of 2.99MiB at  1.03MiB/s ETA 00:01
[download]  60.8% of 2.99MiB at 942.47KiB/s ETA 00:01
[download]  88.1% of 2.99MiB at 908.52KiB/s ETA 00:00
[download] 100.0% of 2.99MiB at 897.53KiB/s ETA 00:00
[download] 100% of 2.99MiB in 00:03
MKV

05-05-2017_00:35:15:677036
*****END OF YOUTUBE*****
*****START OF YOUTUBE*****

VIDEO

[download]   0.0% of 41.89MiB at 251.26KiB/s ETA 02:55
[download]   0.0% of 41.89MiB at 612.01KiB/s ETA 01:10
[download]   0.0% of 41.89MiB at  1.23MiB/s ETA 00:34
[download]   0.0% of 41.89MiB at  2.33MiB/s ETA 00:18
[download]   0.1% of 41.89MiB at 783.21KiB/s ETA 00:54
[download]   0.1% of 41.89MiB at 959.46KiB/s ETA 00:44
[download]   0.3% of 41.89MiB at  1.16MiB/s ETA 00:36
[download]   0.6% of 41.89MiB at  1.45MiB/s ETA 00:28
[download]   1.2% of 41.89MiB at  1.15MiB/s ETA 00:35
[download]   2.4% of 41.89MiB at 986.82KiB/s ETA 00:42
[download]   4.4% of 41.89MiB at 912.91KiB/s ETA 00:44
[download]   6.3% of 41.89MiB at 877.92KiB/s ETA 00:45
[download]   8.2% of 41.89MiB at 870.89KiB/s ETA 00:45
[download]  10.2% of 41.89MiB at 865.95KiB/s ETA 00:44
[download]  12.1% of 41.89MiB at 862.33KiB/s ETA 00:43
[download]  14.1% of 41.89MiB at 859.01KiB/s ETA 00:42
[download]  16.1% of 41.89MiB at 857.18KiB/s ETA 00:42
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[download] 100.0% of 41.89MiB at 840.32KiB/s ETA 00:00
[download] 100% of 41.89MiB in 00:51
AUDIO

[download]   0.0% of 10.35MiB at 114.98KiB/s ETA 01:32
[download]   0.0% of 10.35MiB at 317.99KiB/s ETA 00:33
[download]   0.1% of 10.35MiB at 694.85KiB/s ETA 00:15
[download]   0.1% of 10.35MiB at  1.37MiB/s ETA 00:07
[download]   0.3% of 10.35MiB at 846.04KiB/s ETA 00:12
[download]   0.6% of 10.35MiB at  1.14MiB/s ETA 00:09
[download]   1.2% of 10.35MiB at  1.29MiB/s ETA 00:07
[download]   2.4% of 10.35MiB at  1.71MiB/s ETA 00:05
[download]   4.8% of 10.35MiB at  2.00MiB/s ETA 00:04
[download]   9.7% of 10.35MiB at  1.17MiB/s ETA 00:07
[download]  17.7% of 10.35MiB at 985.70KiB/s ETA 00:08
[download]  25.3% of 10.35MiB at 940.66KiB/s ETA 00:08
[download]  33.3% of 10.35MiB at 916.90KiB/s ETA 00:07
[download]  41.4% of 10.35MiB at 900.34KiB/s ETA 00:06
[download]  49.3% of 10.35MiB at 885.27KiB/s ETA 00:06
[download]  56.9% of 10.35MiB at 880.58KiB/s ETA 00:05
[download]  65.0% of 10.35MiB at 876.17KiB/s ETA 00:04
[download]  73.0% of 10.35MiB at 868.96KiB/s ETA 00:03
[download]  80.7% of 10.35MiB at 867.56KiB/s ETA 00:02
[download]  88.7% of 10.35MiB at 865.95KiB/s ETA 00:01
[download]  96.7% of 10.35MiB at 862.35KiB/s ETA 00:00
[download] 100.0% of 10.35MiB at 862.21KiB/s ETA 00:00
[download] 100% of 10.35MiB in 00:12
MKV


05-05-2017_00:36:24:569523
*****END OF YOUTUBE*****
*****START OF YOUTUBE*****

VIDEO

[download]   0.0% of 5.30MiB at 188.75KiB/s ETA 00:29
[download]   0.1% of 5.30MiB at 474.99KiB/s ETA 00:11
[download]   0.1% of 5.30MiB at 984.97KiB/s ETA 00:05
[download]   0.3% of 5.30MiB at  1.85MiB/s ETA 00:02
[download]   0.6% of 5.30MiB at 896.97KiB/s ETA 00:06
[download]   1.2% of 5.30MiB at 888.54KiB/s ETA 00:06
[download]   2.3% of 5.30MiB at 1006.45KiB/s ETA 00:05
[download]   4.7% of 5.30MiB at 916.41KiB/s ETA 00:05
[download]   9.4% of 5.30MiB at 863.70KiB/s ETA 00:05
[download]  18.9% of 5.30MiB at 847.73KiB/s ETA 00:05
[download]  34.2% of 5.30MiB at 843.72KiB/s ETA 00:04
[download]  49.7% of 5.30MiB at 840.54KiB/s ETA 00:03
[download]  65.0% of 5.30MiB at 839.77KiB/s ETA 00:02
[download]  80.5% of 5.30MiB at 839.71KiB/s ETA 00:01
[download]  95.9% of 5.30MiB at 839.39KiB/s ETA 00:00
[download] 100.0% of 5.30MiB at 842.74KiB/s ETA 00:00
[download] 100% of 5.30MiB in 00:06
AUDIO

[download]   0.0% of 2.99MiB at 112.61KiB/s ETA 00:27
[download]   0.1% of 2.99MiB at 311.43KiB/s ETA 00:09
[download]   0.2% of 2.99MiB at 682.19KiB/s ETA 00:04
[download]   0.5% of 2.99MiB at  1.32MiB/s ETA 00:02
[download]   1.0% of 2.99MiB at 943.80KiB/s ETA 00:03
[download]   2.1% of 2.99MiB at  1.17MiB/s ETA 00:02
[download]   4.1% of 2.99MiB at  1.31MiB/s ETA 00:02
[download]   8.3% of 2.99MiB at  1.59MiB/s ETA 00:01
[download]  16.7% of 2.99MiB at  1.37MiB/s ETA 00:01
[download]  33.4% of 2.99MiB at  1.03MiB/s ETA 00:01
[download]  60.8% of 2.99MiB at 942.47KiB/s ETA 00:01
[download]  88.1% of 2.99MiB at 908.52KiB/s ETA 00:00
[download] 100.0% of 2.99MiB at 897.53KiB/s ETA 00:00
[download] 100% of 2.99MiB in 00:03
MKV


05-05-2017_00:35:15:677036
*****END OF YOUTUBE*****

实际文件比这个长。 获取行 block 后，我想计算具有百分比等数据的实例数量。就像从视频到音频的第一个 block 一样，它有 17 行。

示例输出

Video to Audio
Count = 17

Audio to MKV
Count = 14

然后再次重复直到文件末尾，所以应该是

最终示例输出

Video to Audio
Count = 17

Audio to MKV
Count = 14

Video to Audio
Count = 61

Audio to MKV
Count = 23

最佳答案

这是使用字符串的 find 方法的解决方案:

您作为示例给出的字符串:

string = """
*****START OF YOUTUBE*****

VIDEO

[download]   0.0% of 5.30MiB at 188.75KiB/s ETA 00:29
[download]   0.1% of 5.30MiB at 474.99KiB/s ETA 00:11
[download]   0.1% of 5.30MiB at 984.97KiB/s ETA 00:05
[download]   0.3% of 5.30MiB at  1.85MiB/s ETA 00:02
[download]   0.6% of 5.30MiB at 896.97KiB/s ETA 00:06
[download]   1.2% of 5.30MiB at 888.54KiB/s ETA 00:06
[download]   2.3% of 5.30MiB at 1006.45KiB/s ETA 00:05
[download]   4.7% of 5.30MiB at 916.41KiB/s ETA 00:05
[download]   9.4% of 5.30MiB at 863.70KiB/s ETA 00:05
[download]  18.9% of 5.30MiB at 847.73KiB/s ETA 00:05
[download]  34.2% of 5.30MiB at 843.72KiB/s ETA 00:04
[download]  49.7% of 5.30MiB at 840.54KiB/s ETA 00:03
[download]  65.0% of 5.30MiB at 839.77KiB/s ETA 00:02
[download]  80.5% of 5.30MiB at 839.71KiB/s ETA 00:01
[download]  95.9% of 5.30MiB at 839.39KiB/s ETA 00:00
[download] 100.0% of 5.30MiB at 842.74KiB/s ETA 00:00
[download] 100% of 5.30MiB in 00:06
AUDIO

[download]   0.0% of 2.99MiB at 112.61KiB/s ETA 00:27
[download]   0.1% of 2.99MiB at 311.43KiB/s ETA 00:09
[download]   0.2% of 2.99MiB at 682.19KiB/s ETA 00:04
[download]   0.5% of 2.99MiB at  1.32MiB/s ETA 00:02
[download]   1.0% of 2.99MiB at 943.80KiB/s ETA 00:03
[download]   2.1% of 2.99MiB at  1.17MiB/s ETA 00:02
[download]   4.1% of 2.99MiB at  1.31MiB/s ETA 00:02
[download]   8.3% of 2.99MiB at  1.59MiB/s ETA 00:01
[download]  16.7% of 2.99MiB at  1.37MiB/s ETA 00:01
[download]  33.4% of 2.99MiB at  1.03MiB/s ETA 00:01
[download]  60.8% of 2.99MiB at 942.47KiB/s ETA 00:01
[download]  88.1% of 2.99MiB at 908.52KiB/s ETA 00:00
[download] 100.0% of 2.99MiB at 897.53KiB/s ETA 00:00
[download] 100% of 2.99MiB in 00:03
MKV

05-05-2017_00:35:15:677036
*****END OF YOUTUBE*****
*****START OF YOUTUBE*****

VIDEO

[download]   0.0% of 41.89MiB at 251.26KiB/s ETA 02:55
[download]   0.0% of 41.89MiB at 612.01KiB/s ETA 01:10
[download]   0.0% of 41.89MiB at  1.23MiB/s ETA 00:34
[download]   0.0% of 41.89MiB at  2.33MiB/s ETA 00:18
[download]   0.1% of 41.89MiB at 783.21KiB/s ETA 00:54
[download]   0.1% of 41.89MiB at 959.46KiB/s ETA 00:44
[download]   0.3% of 41.89MiB at  1.16MiB/s ETA 00:36
[download]   0.6% of 41.89MiB at  1.45MiB/s ETA 00:28
[download]   1.2% of 41.89MiB at  1.15MiB/s ETA 00:35
[download]   2.4% of 41.89MiB at 986.82KiB/s ETA 00:42
[download]   4.4% of 41.89MiB at 912.91KiB/s ETA 00:44
[download]   6.3% of 41.89MiB at 877.92KiB/s ETA 00:45
[download]   8.2% of 41.89MiB at 870.89KiB/s ETA 00:45
[download]  10.2% of 41.89MiB at 865.95KiB/s ETA 00:44
[download]  12.1% of 41.89MiB at 862.33KiB/s ETA 00:43
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[download] 100.0% of 41.89MiB at 840.32KiB/s ETA 00:00
[download] 100% of 41.89MiB in 00:51
AUDIO

[download]   0.0% of 10.35MiB at 114.98KiB/s ETA 01:32
[download]   0.0% of 10.35MiB at 317.99KiB/s ETA 00:33
[download]   0.1% of 10.35MiB at 694.85KiB/s ETA 00:15
[download]   0.1% of 10.35MiB at  1.37MiB/s ETA 00:07
[download]   0.3% of 10.35MiB at 846.04KiB/s ETA 00:12
[download]   0.6% of 10.35MiB at  1.14MiB/s ETA 00:09
[download]   1.2% of 10.35MiB at  1.29MiB/s ETA 00:07
[download]   2.4% of 10.35MiB at  1.71MiB/s ETA 00:05
[download]   4.8% of 10.35MiB at  2.00MiB/s ETA 00:04
[download]   9.7% of 10.35MiB at  1.17MiB/s ETA 00:07
[download]  17.7% of 10.35MiB at 985.70KiB/s ETA 00:08
[download]  25.3% of 10.35MiB at 940.66KiB/s ETA 00:08
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[download]  56.9% of 10.35MiB at 880.58KiB/s ETA 00:05
[download]  65.0% of 10.35MiB at 876.17KiB/s ETA 00:04
[download]  73.0% of 10.35MiB at 868.96KiB/s ETA 00:03
[download]  80.7% of 10.35MiB at 867.56KiB/s ETA 00:02
[download]  88.7% of 10.35MiB at 865.95KiB/s ETA 00:01
[download]  96.7% of 10.35MiB at 862.35KiB/s ETA 00:00
[download] 100.0% of 10.35MiB at 862.21KiB/s ETA 00:00
[download] 100% of 10.35MiB in 00:12
MKV


05-05-2017_00:36:24:569523
*****END OF YOUTUBE*****
*****START OF YOUTUBE*****

VIDEO

[download]   0.0% of 5.30MiB at 188.75KiB/s ETA 00:29
[download]   0.1% of 5.30MiB at 474.99KiB/s ETA 00:11
[download]   0.1% of 5.30MiB at 984.97KiB/s ETA 00:05
[download]   0.3% of 5.30MiB at  1.85MiB/s ETA 00:02
[download]   0.6% of 5.30MiB at 896.97KiB/s ETA 00:06
[download]   1.2% of 5.30MiB at 888.54KiB/s ETA 00:06
[download]   2.3% of 5.30MiB at 1006.45KiB/s ETA 00:05
[download]   4.7% of 5.30MiB at 916.41KiB/s ETA 00:05
[download]   9.4% of 5.30MiB at 863.70KiB/s ETA 00:05
[download]  18.9% of 5.30MiB at 847.73KiB/s ETA 00:05
[download]  34.2% of 5.30MiB at 843.72KiB/s ETA 00:04
[download]  49.7% of 5.30MiB at 840.54KiB/s ETA 00:03
[download]  65.0% of 5.30MiB at 839.77KiB/s ETA 00:02
[download]  80.5% of 5.30MiB at 839.71KiB/s ETA 00:01
[download]  95.9% of 5.30MiB at 839.39KiB/s ETA 00:00
[download] 100.0% of 5.30MiB at 842.74KiB/s ETA 00:00
[download] 100% of 5.30MiB in 00:06
AUDIO

[download]   0.0% of 2.99MiB at 112.61KiB/s ETA 00:27
[download]   0.1% of 2.99MiB at 311.43KiB/s ETA 00:09
[download]   0.2% of 2.99MiB at 682.19KiB/s ETA 00:04
[download]   0.5% of 2.99MiB at  1.32MiB/s ETA 00:02
[download]   1.0% of 2.99MiB at 943.80KiB/s ETA 00:03
[download]   2.1% of 2.99MiB at  1.17MiB/s ETA 00:02
[download]   4.1% of 2.99MiB at  1.31MiB/s ETA 00:02
[download]   8.3% of 2.99MiB at  1.59MiB/s ETA 00:01
[download]  16.7% of 2.99MiB at  1.37MiB/s ETA 00:01
[download]  33.4% of 2.99MiB at  1.03MiB/s ETA 00:01
[download]  60.8% of 2.99MiB at 942.47KiB/s ETA 00:01
[download]  88.1% of 2.99MiB at 908.52KiB/s ETA 00:00
[download] 100.0% of 2.99MiB at 897.53KiB/s ETA 00:00
[download] 100% of 2.99MiB in 00:03
MKV


05-05-2017_00:35:15:677036
*****END OF YOUTUBE*****
"""

实际解决方案:

audio_indexes = []
video_indexes = []
mkv_indexes = []
audios = string.find("AUDIO")
while audios > 0:
    audio_indexes.append(audios)
    audios = string.find("AUDIO", audios+len("AUDIO"))
videos = string.find("VIDEO")
while videos > 0:
    video_indexes.append(videos)
    videos = string.find("VIDEO", videos+len("VIDEO"))
mkv = string.find("MKV")
while mkv > 0:
    mkv_indexes.append(mkv)
    mkv = string.find("MKV", mkv+len("MKV"))

for i, k in enumerate(video_indexes):
    print("Video to Audio: %d" % string[k:audio_indexes[i]].count('[download]'))
for i, k in enumerate(audio_indexes):
    print("Audio to MKV: %d" % string[k:mkv_indexes[i]].count('[download]'))

输出:

Video to Audio: 17
Video to Audio: 61
Video to Audio: 17
Audio to MKV: 14
Audio to MKV: 23
Audio to MKV: 14

当然，您可以更改这些内容的打印顺序。

关于python - 如何连续读取细节 block 并计算文本行数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43860764/

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