Python - 如何将段落与文本分开？

Question

我需要将文本分成段落并能够处理每个段落。我怎样才能做到这一点？每 2 个段落之间至少可以有 1 个空行。像这样：

Hello world,
  this is an example.

Let´s program something.


Creating  new  program.

Answer 1

这个灵魂作品：

text.split('\n\n')

Answer 2

尝试

result = list(filter(lambda x : x != '', text.split('\n\n')))

Answer 3

这不是一个完全微不足道的问题，标准库似乎没有任何现成的解决方案。

示例中的段落被至少两个换行符分割，不幸的是，这使得

text.split("\n\n")

无效。我认为，相反，通过正则表达式分割是一种可行的策略：

import fileinput
import re

NEWLINES_RE = re.compile(r"\n{2,}")  # two or more "\n" characters

def split_paragraphs(input_text=""):
    no_newlines = input_text.strip("\n")  # remove leading and trailing "\n"
    split_text = NEWLINES_RE.split(no_newlines)  # regex splitting

    paragraphs = [p + "\n" for p in split_text if p.strip()]
    # p + "\n" ensures that all lines in the paragraph end with a newline
    # p.strip() == True if paragraph has other characters than whitespace

    return paragraphs

# sample code, to split all script input files into paragraphs
text = "".join(fileinput.input())
for paragraph in split_paragraphs(text):
    print(f"<<{paragraph}>>\n")

编辑添加：

使用状态机方法可能更干净。这是一个使用生成器函数的相当简单的示例，它的额外好处是一次一行地流式传输输入，而不是将输入的完整副本存储在内存中：

import fileinput

def split_paragraph2(input_lines):
    paragraph = []  # store current paragraph as a list
    for line in input_lines:
        if line.strip():  # True if line is non-empty (apart from whitespace)
            paragraph.append(line)
        elif paragraph:  # If we see an empty line, return paragraph (if any)
            yield "".join(paragraph)
            paragraph = []
    if paragraph:  # After end of input, return final paragraph (if any)
        yield "".join(paragraph)

# sample code, to split all script input files into paragraphs
for paragraph in split_paragraph2(fileinput.input()):
    print(f"<<{paragraph}>>\n")

Answer 4

我通常会拆分然后过滤掉“”并剥离。 ;)

a =\
'''
Hello world,
  this is an example.

Let´s program something.


Creating  new  program.


'''

data = [content.strip() for content in a.splitlines() if content]

print(data)

Answer 5

这对我有用：

text = "".join(text.splitlines())
text.split('something that is almost always used to separate sentences (i.e. a period, question mark, etc.)')

Answer 6

更容易。我也有同样的问题。

只需更换双 输入一个您在文本中很少看到的术语（此处为 3/4）：

---

a ='''
Hello world,
  this is an example.

Let´s program something.


Creating  new  program.'''
a = a.replace("\n\n" , "¾")

splitted_text = a.split('¾')

print(splitted_text)