Python for循环迭代将多行合并到一行中

Question

我有一个我正在尝试解析的 CSV 文件，但问题是其中一个单元格包含充满空值和换行符的数据块。我需要将每一行包含在一个数组中，并将该特定单元格中的所有内容合并到相应的行中。我最近发布了一个类似的问题，答案部分解决了我的问题，但是我在构建一个循环遍历不满足特定启动条件的每一行时遇到了问题。我的代码只合并了不满足该条件的第一行，但之后就中断了。

我有：

file ="myfile.csv"
condition = "DAT"

data = open(file).read().split("\n")
for i, line in enumerate(data):
    if not line.startswith(condition):
        data[i-1] = data[i-1]+line
        data.pop(i)
print data

对于如下所示的 CSV：

Case  | Info
-------------------
DAT1    single line  
DAT2    "Berns, 17, died Friday of complications from Hutchinson-Gilford progeria   syndrome, commonly known as progeria. He was diagnosed with progeria when he was 22 months old. His physician parents founded the nonprofit Progeria Research Foundation after his diagnosis.

Berns became the subject of an HBO documentary, ""Life According to Sam."" The exposure has brought greater recognition to the condition, which causes musculoskeletal degeneration, cardiovascular problems and other symptoms associated with aging.

Kraft met the young sports fan and attended the HBO premiere of the documentary in New    York in October. Kraft made a $500,000 matching pledge to the foundation.

The Boston Globe reported that Berns was invited to a Patriots practice that month, and gave the players an impromptu motivational speech.

DAT3    single line
DAT4    YWYWQIDOWCOOXXOXOOOOOOOOOOO 

它确实将完整的句子与上一行连接起来。但是当它遇到双空格或双行时，它会失败并将其注册为新行。例如，如果我打印：

data[0]

输出是：

DAT1    single line

如果我打印：

data[1]

输出是：

DAT2    "Berns, 17, died Friday of complications from Hutchinson-Gilford progeria syndrome, commonly known as progeria. He was diagnosed with progeria when he was 22 months old. His physician parents founded the nonprofit Progeria Research Foundation after his diagnosis.

但是如果我打印：

data[2]

输出是：

Berns became the subject of an HBO documentary, ""Life According to Sam."" The exposure has brought greater recognition to the condition, which causes musculoskeletal degeneration, cardiovascular problems and other symptoms associated with aging.

代替：

DAT3    single line

如何合并“信息”列上的全部文本，使其始终与相应的 DAT 行匹配，而不是作为新行弹出，而不管空字符还是换行符？

Answer 1

在迭代 data 时更改它是“不好的”

new_data = []
for line in data:
    if not new_data or line.startswith(condition):
        new_data.append(line)
    else:
        new_data[-1] += line
print new_data

Answer 2

你可以用正则表达式直接将行拆分成data:

Python

import re

f = open("myfile.csv")
text = f.read()
data = re.findall("\n(DAT\d+.*)", text)

如果没有帮助，请纠正我。

更新：

我相信，这将解决新行的问题：

import re

f = open("myfile.csv")
text = f.read()
lines = re.split(r"\n(?=DAT\d+)", text)
lines.pop(0)