Question

在我需要的数据之前，我有一个文本文件，其中包含许多调试信息。我正在使用python3尝试重写输出，以便文件以特定的json标签开头。我尝试使用此解决方案remove string and all lines before string from file python，但是我得到的输出文件为空，因此我认为它没有找到json标签。

这是我的代码：

tag = '"meta": ['
tag_found = False 

with open('file.in',encoding="utf8") as in_file:
with open('file.out','w',encoding="utf8") as out_file:
    for line in in_file:
        if tag_found:
            if line.strip() == tag:
                tag_found = True 
            else:
                out_file.write(line)

感谢您的帮助。

Answer 1

tag = '"meta": ['
lines_to_write = []
tag_found = False

with open('file.in',encoding="utf8") as in_file:
    for line in in_file:
        if line.strip() == tag:
            tag_found = True
        if tag_found:
            lines_to_write.append(line)
with open('file.out','w',encoding="utf8") as out_file:
    out_file.writelines(lines_to_write)

Answer 2

您的tag_found始终为False：

tag = '"meta": ['
tag_found = False 

with open('file.in',encoding="utf8") as in_file:
with open('file.out','w',encoding="utf8") as out_file:
    for line in in_file:
        if not tag_found and line.strip() == tag:
            tag_found = True
            continue

        if tag_found:
             out_file.write(line)

从文本文件中删除所有行，直到特定的字符串-python3

2 个答案: