How to save data to a file

[Vitali Coltuclu]

Hello,

I would like to save data from the text area to a file. My attempt doesn't work:

data = doc["txt_area"].html
with open("test.txt", 'w') as f:
    f.write(data)

I would appreciate any comments/suggestions.

Thank you,
Vitali

[Kiko]

Have a look here to see how it could be made with js: http://runnable.com/U5HC9xtufQpsu5aj/use-javascript-to-save-textarea-as-a-txt-file

https://developer.mozilla.org/en-US/docs/Web/API/Blob

 

Thank you,
Vitali

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[Vitali Coltuclu]

Thank you, kiko, for your reply. So my understanding is that brython itself does not support saving data to a file.

Best,
Vitali

[Billy Earney]

you could try:

from browser import local_storage
local_storage.storage["test.txt"]=data

Since this is a browser environment, you cannot write to the OS.  This is probably the easiest way to emulate a file system in a browser environment.

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[Kiko]

2015-04-01 4:39 GMT+02:00 Billy Earney <billy....@gmail.com>:

you could try:

from browser import local_storage
local_storage.storage["test.txt"]=data

Since this is a browser environment, you cannot write to the OS.  This is probably the easiest way to emulate a file system in a browser environment.

As Billy stated, it is not safe to let the browser access to the file system. With a Blob object you can create a ''virtual file'' and then create a link to it to save it.

It is very easy to create your own python write function using the example linked in my previous email ;-)

If you have any trouble with it just post it here.

 

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[Billy Earney]

There's an idea..

what about expanding the open function so that if someone appends a file/path with 'localstorage:', we know to read/write to local storage, and otherwise it is a URL call?

This is kind of like sqlite3 with its open function with an argument of ":memory:", which means to write the database only to memory and not disk.

What do you guys think?  Is this a bad idea?

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[Juan Carlos]

On Wed, Apr 1, 2015 at 2:38 PM, Billy Earney <billy....@gmail.com> wrote:

There's an idea..

what about expanding the open function so that if someone appends a file/path with 'localstorage:', we know to read/write to local storage, and otherwise it is a URL call?

This is kind of like sqlite3 with its open function with an argument of ":memory:", which means to write the database only to memory and not disk.

Nope. I think Brython open() should mimic Python3 open(), not mocking a Database Query Language,

A helper tiny module to download a file from a localstorage file should be better I think, as seamless as posible, that should work even when offline.