Question

我想知道如何在同一文本文件中分隔文本块。示例如下。基本上我有两个项目，一个来自＆＃34;第9频道＆＃34;与＆＃34;简要：...＆＃34;，另一个以＆＃34;南方...＆＃34;开头。再来一次，＆＃34; Brief＆＃34;线。如何用python将它们分成2个文本文件？我认为公共分频器是＆＃34;（女16 +）＆＃34;。非常感谢！

Channel 9 (1 item)

A woman selling her caravan near Bendigo has been left 
$1,100 out
hosted by Peter Hitchener
A woman selling her caravan near Bendigo has been left $1,100 out of 
pocket after an elderly couple made the purchase with counterfeit money. 
The wildlife worker tried to use the notes to pay for a house deposit, but an 
agent noticed the notes were missing the Coat of Arms on one side. 


Brief: Radio & TV
Demographics: 153,000 (male 16+) • 177,000 (female 
16+)

Southern Cross Victoria Bendigo (1 item)


Heathcote Police are warning the residents to be on the 
lookout a
hosted by Jo Hall
Heathcote Police are warning the residents to be on the lookout after a large 
dash of fake $50 note was discovered. Victim Marianne Thomas was given 
counterfeit notes from a caravan. The Heathcote resident tried to pay the 
house deposit and that's when the counterfeit notes were spotted. Thomas 
says the caravan is in town for the Spanish Festival.


Brief: Radio & TV
Demographics: 4,000 (male 16+) • 3,000 (female 16+)

Answer 1

这是我最近做过的类似事情的修改示例，基本上是通过你的文本和逐行复制。核心逻辑基于附加到当前文件名，该文件名在找到新部分后重置。将使用下一节的第一行作为文件名。

#!/usr/bin/env python
import re

data = """
Channel 9 (1 item)

A woman selling her caravan near Bendigo has been left $1,100 out hosted by
Peter Hitchener A woman selling her caravan near Bendigo has been left $1,100
out of pocket after an elderly couple made the purchase with counterfeit money.
The wildlife worker tried to use the notes to pay for a house deposit, but an
agent noticed the notes were missing the Coat of Arms on one side.

Brief: Radio & TV Demographics: 153,000 (male 16+) • 177,000 (female 16+)

Southern Cross Victoria Bendigo (1 item)

Heathcote Police are warning the residents to be on the lookout a hosted by Jo
Hall Heathcote Police are warning the residents to be on the lookout after a
large dash of fake $50 note was discovered. Victim Marianne Thomas was given
counterfeit notes from a caravan. The Heathcote resident tried to pay the house
deposit and that's when the counterfeit notes were spotted. Thomas says the
caravan is in town for the Spanish Festival.

Brief: Radio & TV Demographics: 4,000 (male 16+) • 3,000 (female 16+)
"""



current_file = None
for line in data.split('\n'):

    # Set initial filename
    if current_file == None and line != '':
        current_file = line + '.txt'

    # This is to handle the blank line after Brief
    if current_file == None:
        continue

    text_file = open(current_file, "a")
    text_file.write(line + "\n")
    text_file.close()

    # Reset filename if we have finished this section
    # which is idenfitied by:
    #    starts with Brief - ^Brief
    #    contains some random amount of text - .*
    #    ends with ) - )$
    if re.match(r'^Brief:.*\)$', line) is not None:
        current_file = None

这将输出以下文件

Channel 9 (1 item).txt
Southern Cross Victoria Bendigo (1 item).txt

Answer 2

实际上，我怀疑你确实想要在以Demographics:开头的链接之后，或者在以(1 item)或(2 items)或类似结尾的行之前中断。

但是你要打破局面，有两个步骤：

提出一条规则，您可以将其转换为您在每一行上调用的函数。
根据该函数的结果编写一些对事物进行分组的代码。

让我们使用您的规则。其功能可能是：

def is_last_line(line):
    return line.strip().endswith('(female 16+)')

现在，您可以使用该功能对事物进行分组：

i = 1
outfile = open(f'outfile{i}.txt', 'w')
for line in infile:
    outfile.write(line.strip())
    if is_last_line(line):
        i += 1
        outfile = open(f'outfile{i}.txt', 'w')
outfile.close()

通过使用例如itertools.groupby，itertools.takewhile，iter或其他功能，您可以通过各种方式更加简洁。或者你可以编写一个仍然手动执行的生成器函数，但yield的行组，这将允许创建新文件更简单（让我们使用with块）。但是这样明确可能会让初学者更容易理解（以及调试，并在以后进行扩展），但需要花费一些冗长的代价。

例如，从您提出问题的方式来看，您是否确实希望Demographics:行显示在输出文件中并不是很清楚。如果你不这样做，应该明白如何改变一切：

    if not is_last_line(line):
        outfile.write(line.strip())
    else:
        i += 1
        outfile = open(f'outfile{i}.txt', 'w')

Answer 3

这是硬编码的一部分，可以完成这项工作：

s = """Channel 9 (1 item)

A woman selling her caravan near Bendigo has been left $1,100 out hosted by Peter Hitchener A woman selling her caravan near Bendigo has been left $1,100 out of pocket after an elderly couple made the purchase with counterfeit money. The wildlife worker tried to use the notes to pay for a house deposit, but an agent noticed the notes were missing the Coat of Arms on one side.

Brief: Radio & TV Demographics: 153,000 (male 16+) • 177,000 (female 16+)

Southern Cross Victoria Bendigo (1 item)

Heathcote Police are warning the residents to be on the lookout a hosted by Jo Hall Heathcote Police are warning the residents to be on the lookout after a large dash of fake $50 note was discovered. Victim Marianne Thomas was given counterfeit notes from a caravan. The Heathcote resident tried to pay the house deposit and that's when the counterfeit notes were spotted. Thomas says the caravan is in town for the Spanish Festival.

Brief: Radio & TV Demographics: 4,000 (male 16+) • 3,000 (female 16+)"""

part_1 = s[s.index("Channel 9"):s.index("Southern Cross")]

part_2 = s[s.index("Southern Cross"):]

然后将它们保存到文件中。

Answer 4

看起来以＆＃34; 受众特征：＆＃34;开头的行充当真正的分隔符。我会用两种方式使用正则表达式：首先，用这些行分割文本;第二，自己提取这些行。然后可以将结果组合起来重建块：

import re
DIVIDER = 'Demographics: .+' # Make it tunable, in case you change your mind
blocks_1 = re.split(DIVIDER, text)
blocks_2 = re.findall(DIVIDER, text)
blocks = ['\n\n'.join(pair) for pair in zip(blocks_1, blocks_2)
blocks[0]
#Channel 9 (1 item)\n\nA woman selling her caravan near ... 
#... Demographics: 153,000 (male 16+) • 177,000 (female 16+)

单独的文本python块

4 个答案: