我有一个文件，我需要获得每个块的总ETA时间和该块的第一个ETA时间实例。这是我的数据的一个例子。
*****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
*****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
[download] 18.0% of 41.89MiB at 855.34KiB/s ETA 00:41
[download] 20.0% of 41.89MiB at 850.76KiB/s ETA 00:40
[download] 21.9% of 41.89MiB at 850.71KiB/s ETA 00:39
[download] 23.9% of 41.89MiB at 850.61KiB/s ETA 00:38
[download] 25.9% of 41.89MiB at 850.12KiB/s ETA 00:37
[download] 27.8% of 41.89MiB at 849.74KiB/s ETA 00:36
[download] 29.8% of 41.89MiB at 849.08KiB/s ETA 00:35
[download] 31.7% of 41.89MiB at 848.78KiB/s ETA 00:34
[download] 33.7% of 41.89MiB at 846.31KiB/s ETA 00:33
[download] 35.6% of 41.89MiB at 844.42KiB/s ETA 00:32
[download] 37.5% of 41.89MiB at 844.68KiB/s ETA 00:31
[download] 39.5% of 41.89MiB at 844.87KiB/s ETA 00:30
[download] 41.5% of 41.89MiB at 844.76KiB/s ETA 00:29
[download] 43.4% of 41.89MiB at 844.93KiB/s ETA 00:28
[download] 45.4% of 41.89MiB at 844.77KiB/s ETA 00:27
[download] 47.4% of 41.89MiB at 843.37KiB/s ETA 00:26
[download] 49.2% of 41.89MiB at 843.65KiB/s ETA 00:25
[download] 51.2% of 41.89MiB at 843.66KiB/s ETA 00:24
[download] 53.2% of 41.89MiB at 843.50KiB/s ETA 00:23
[download] 55.2% of 41.89MiB at 843.46KiB/s ETA 00:22
[download] 57.1% of 41.89MiB at 843.19KiB/s ETA 00:21
[download] 59.1% of 41.89MiB at 843.22KiB/s ETA 00:20
[download] 61.0% of 41.89MiB at 842.88KiB/s ETA 00:19
[download] 63.0% of 41.89MiB at 843.00KiB/s ETA 00:18
[download] 65.0% of 41.89MiB at 842.80KiB/s ETA 00:17
[download] 66.9% of 41.89MiB at 842.91KiB/s ETA 00:16
[download] 68.9% of 41.89MiB at 842.09KiB/s ETA 00:15
[download] 70.8% of 41.89MiB at 842.40KiB/s ETA 00:14
[download] 72.8% of 41.89MiB at 840.95KiB/s ETA 00:13
[download] 74.6% of 41.89MiB at 840.38KiB/s ETA 00:12
[download] 76.5% of 41.89MiB at 840.77KiB/s ETA 00:11
[download] 78.5% of 41.89MiB at 840.21KiB/s ETA 00:10
[download] 80.4% of 41.89MiB at 840.45KiB/s ETA 00:09
[download] 82.4% of 41.89MiB at 840.65KiB/s ETA 00:08
[download] 84.4% of 41.89MiB at 840.80KiB/s ETA 00:07
[download] 86.4% of 41.89MiB at 840.35KiB/s ETA 00:06
[download] 88.3% of 41.89MiB at 840.73KiB/s ETA 00:05
[download] 90.3% of 41.89MiB at 840.32KiB/s ETA 00:04
[download] 92.2% of 41.89MiB at 840.69KiB/s ETA 00:03
[download] 94.2% of 41.89MiB at 840.31KiB/s ETA 00:02
[download] 96.1% of 41.89MiB at 840.64KiB/s ETA 00:01
[download] 98.1% of 41.89MiB at 840.26KiB/s ETA 00:00
[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
*****END OF YOUTUBE*****
每个块的起点是视频到音频，然后另一个是音频到mkv。第一个块的样本输出应为：
First Block Video to Audio:
ETA TIME Instance = 00:29
Block ETA Time total = 01:35
Second Block Audio to Mkv:
ETA TIME Instance = 00:27
Block ETA Time total = 00:56
直到文件结束。
答案 0 :(得分：1)
这是一个基本的解决方案：
from collections import deque
import re
import datetime
def print_block(first, last, first_eta, total_eta):
print("First Block {} to {}:".format(first.capitalize(), last.capitalize()))
print("ETA TIME Instance = {}".format(str(first_eta)))
print("Block ETA Time total = {}".format(str(total_eta)))
print()
def convert_to_timedelta(time_delta):
blocks = time_delta.split(":")
if len(blocks) == 2:
return datetime.timedelta(minutes=int(blocks[0]), seconds=int(blocks[1]))
else:
return datetime.timedelta(hours=int(blocks[0]), minutes=int(blocks[1]), seconds=int(blocks[2]))
def process_chunk(chunk):
queue = deque()
first_eta = None
total_eta = datetime.timedelta(hours=0,minutes=0, seconds=0)
for line in chunk:
# If line is a source change, add to queue.
if line.isupper():
queue.append(line)
# If queue is full, pair sources and remove the first one.
# Inner chunk can now be printed.
if len(queue) == 2:
first = queue.popleft()
last = queue[0]
print_block(first, last, first_eta, total_eta)
# Reset etas.
first_eta = None
total_eta = datetime.timedelta(hours=0,minutes=0, seconds=0)
else:
# Find ETA **:** value.
m = re.search(r'ETA\s(.*)', line)
if m is not None:
time_delta = convert_to_timedelta(m.group(1))
if first_eta == None:
first_eta = time_delta
total_eta += time_delta
# Read file and split up into YOUTUBE blocks.
if __name__ == "__main__":
chunk = []
with open("file.txt", "r") as f:
for line in f:
# Process each youtube block seperately.
if line.startswith("*****END OF YOUTUBE*****"):
process_chunk(chunk)
chunk = []
else:
line = line.rstrip()
if line != '' and not line.startswith('*****START OF YOUTUBE*****'):
chunk.append(line.rstrip())
产生以下结果（根据您的示例）：
First Block Video to Audio:
ETA TIME Instance = 0:00:29
Block ETA Time total = 0:01:29
First Block Audio to Mkv:
ETA TIME Instance = 0:00:27
Block ETA Time total = 0:00:53
First Block Video to Audio:
ETA TIME Instance = 0:02:55
Block ETA Time total = 0:28:22
First Block Audio to Mkv:
ETA TIME Instance = 0:01:32
Block ETA Time total = 0:04:01
请注意，total_eta的计算方法是仅对前缀为ETA的值求和（并且不包括您在计算中执行的总时间线）。如果要更改该行为，只需更改正则表达式。
不是最高效的内存版本（它是O(n^2)），但我认为可读性比速度更重要。可以通过逐行处理块来修改它以在O(n)中运行（而不是在读取整个块之后）。