读取和附加的具体内容 [英] Read and Append the specific content

问题描述

后来到我的previous 的问题，如果我想什么附加线。在这种情况下，阻止他人在输出文件中指定。

Subsequent to my previous question what if I want to append line. In that case others block are also specified in output file.

输入文件FILE1.TXT

##### Xyz
* [] Task 112
* [] Cl 221

##### Foo
* [] Task 1
* [x] Clone 2

##### Bar:
* [x] Email to A
* [] Email to B
* [x] Email to C

##### Bob
* [] Task 3
* [x] Clone Bob

OUTPUTFILE FILE2.TXT

##### Xyz


##### Foo
* [x] Clone 2

##### Bar:
* [x] Email to A
* [x] Email to C

##### Bob
* [x] Clone Bob

输出文件中所示的输出文件predefined结构 - FILE2.TXT与指定块。如果一些新的项目内容* [X]输入被添加的文件应在输出文件追加，不得添加任何重复的项目。看到argparse的使用情况和一个特定的块或整个块开始追加与[X]这将是有趣。感谢：）

The output file is predefined structure as shown in output file - file2.txt with specified blocks. If some new items content * [x] are added in input file it shall append in output file, shall not add any duplicate items. It would be interesting to see the usage of argparse and append one specific block or entire block start with [x]. Thanks :)

推荐答案

从输入读取文件中的所有行，但只写那些以指定的字符串开始：

Read all lines from the input file but write only those that start with specified strings:

with open("file1.txt", "rt") as finp:
    with open("file2.txt", "wt") as fout:
        for line in finp.readlines():
            if line.startswith("#####") or line.startswith("* [x]"):
                fout.write(line)

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