About this article

In this article, I will introduce the code to put a quotation mark at the beginning of the other party's text when replying by e-mail etc. The writer is an amateur. I would appreciate it if you could tell me various things.

I'm not familiar with Python2, but I only know that I'm using Python3 (Is it Python3.6.0?). Therefore, the title of the article is Python3.

Thing you want to do

I would like to output the reply text with ">" at the beginning of the email (the text of the other party) sent as shown below. However, I want to leave the blank lines as they are.

E-mail sent (text of the other party)

Mr Sato

Hello

It is a candidate for a drinking party next week.

Store A good. a little expensive.

Store B The taste is ok. cheap.

Store C I have a lot of drinks. The atmosphere is good.

Suzuki

Text for reply

> Mr. Sato

> Hello

> I'm a candidate for a drinking party next week.

> Store A > Good. a little expensive.

> Store B > The taste is ok. cheap.

> Store C > I have a lot of drinks. The atmosphere is good.

> Suzuki

Implementation code and execution result

The implemented code, usage, and execution example are shown below.

code

`reply_mark.py`


path_r = "sent_text.txt"
path_w = "reply_text.txt"
with open(path_r) as f_r, open(path_w, mode='w') as f_w:
    for line in f_r:
        if len(line) > 1:
            f_w.write(">" + line)
        else:
            f_w.write("\n")

――With open It seems that if you open a file with the writing method of ~, the file will be closed at the end of the block. (Reference: https://note.nkmk.me/python-file-io-open-with/)

--if determines whether the line is blank.

--You can also change> in f_w.write (">" + line) to another symbol, etc. according to your needs.

How to use

Create a file called sent_text.txt in the directory where reply_mark.py is located, and copy and paste the sent mail (the text of the other party).
Run reply_mark.py in the terminal as shown below.
```
$ python reply_mark.py
```
A file called reply_text.txt is created (*), and the reply text with ">" at the beginning of the other party's text is output. When using it, copy it from here.

If a file called reply_text.txt already exists, it will be overwritten.

Input example

`sent_text.txt`


Mr Sato

Hello

It is a candidate for a drinking party next week.

Store A
good. a little expensive.

Store B
The taste is ok. cheap.

Store C
I have a lot of drinks. The atmosphere is good.

Suzuki

Output example

`reply_text.txt`


>Mr Sato

>Hello

>It is a candidate for a drinking party next week.

>Store A
>good. a little expensive.

>Store B
>The taste is ok. cheap.

>Store C
>I have a lot of drinks. The atmosphere is good.

>Suzuki

At the end

I want to make it a little more convenient. Ideally, if you press "command + C" twice in the DeepL app, you'll get results.

Also, I feel that I can do the same thing with a shell script, but it's okay because I'm also studying Python.

If you have any questions, please point out and ask questions. In particular, I think it will be useful to study if there are suggestions for improving how to write code and how to create a mechanism.

Add quotation marks ">" for replying emails in Python3