(For myself) Flask_5 (Add to txt file)

item

1. Add to txt file
2. Quiet talk _ Delete or overwrite any contents of the txt file

1. Add to txt file

html

<form action="/result" method="post">
        <label for="article">Post</label>
        <input type="text" name="article">
        <p></p>
        <label for="name">name</label>
        <input type="text" name="name">
        <button type="submit">Send</button>
    </form>

――This is the code that sends the input contents that you did last time --Saved in ʻarticleandname` respectively

python

article = request.form["article"]
name = request.form["name"]

file = codecs.open("articles.txt", "a", "utf-8")
file.write(article + "," + name + "\n")
file.close()

--You can put this in any route --ʻArticle = request.form ["article"] and name = request.form [" name"] are receiving the input and saved data as you did last time. --file = codecs.open ("articles.txt", "a", "utf-8") `` "a" is the mode to add --Declare to write with .write, separate with, with (article + "," + name + "\ n") , and write line by line by inserting \ n`

2. Quiet talk _ Delete or overwrite any contents of the txt file

--The read mode to put in .open () is

--Read-only mode with r --Write mode with w (this will completely overwrite and delete the previous data) -Mode added to the bottom with ʻa`

There is.

hoge.txt

foobarfoobar

When there is such a txt file,

python

open("hoge.txt","w").write(open("hoge.txt","r").read().replace("bar",""))

By

hoge.txt

foofoo

Can be done.

--This is because r refers to the contents of the txt file before writing with w.

3. At the end

――Honestly, I still don't understand much at the end