使用 Python RE 解析文件，并在找到的字符之间插入换行符

Question

我有一个文件，每当我发现这些字符时我都需要插入一个换行符：}{

它出现了一千多次，所以我需要能够遍历文件的每一行（大约 4k 行）

我的正则表达式很烂，我试过的是：

order_item = re.compile("\}{", re.I)

# creates the file
f = open("orderProductsStructuredDataFinal001", "w", encoding='utf-8')
# opens up the file with the unstructured data, and use it as a iterator
with open('orderProductsStructuredData3') as inf:
    for line in inf:
    order = [ast.literal_eval(op) for op in re.findall(order_item, line)]
    # ta-da! Now do something with the order
    f.write("\n".join(str(x) for x in order))
# closes the file
f.close()

编辑：

with open('orderProdcutsStructuredData3') as inf, open('orderProdcutsStructuredData3') as ("orderProdcutsStructuredDataFinal001", "w", encoding='utf-8'):
for line in inf:
    line = line.replace('}{', '}\n{')
    f.write(line)

Answer 1

你快完成了...:[=15=]

with open('orderProductsStructuredData3') as inf:
    for line in inf:
        line = line.replace('}{', '}\n{')
        f.write(line)

请注意，此特定任务不需要 RE，只需替换字符串。

作为旁注，只需将其嵌入到您正在编写的文件的另一个 with 中——没有理由为它切换到打开和关闭...！即：

with open("orderProductsStructuredDataFinal001", "w", encoding='utf-8') as f:
    with open('orderProductsStructuredData3') as inf:
        for line in inf:
            line = line.replace('}{', '}\n{')
            f.write(line)

您可以将两个 open 放在一个 with 中，以达到类似的效果；但在这种情况下，它们太长了，我认为这会降低可读性。

使用 Python RE 解析文件，并在找到的字符之间插入换行符

Parse file using Python RE, and insert line break between the characters found

python

regex

text-files