Help needed in Datablock Api

nishith006 · March 30, 2020, 7:10am

Can someone tell me how can I add validation set manually into Datablock Api or any image dataloaders.
I tried with ImageDataloader.from_folder, so when I gave the validation set and not giving any valid_pct an error is showing up.

ben007 · March 30, 2020, 7:34am

can you share the error?

nishith006 · March 30, 2020, 7:42am

nishith006 · March 30, 2020, 7:43am

muellerzr · March 30, 2020, 7:56am

If you want more flexibility you should move away from the one liner DataLoader’s and to the DataBlock API. The one liners are there for convenience but won’t solve every problem the more you step away from the assumptions they assume. See notebook 50 for some ideas of how to use it:

github.com

fastai/fastai2/blob/master/nbs/50_tutorial.datablock.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "#hide\n",
    "from fastai2.data.all import *\n",
    "from nbdev.showdoc import show_doc"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Data block tutorial\n",
    "\n",
    "> Using the data block accross all applications"

This file has been truncated. show original

I also have an introductory blog as well

nishith006 · March 30, 2020, 7:58am

Okay I will look into it, but my problem was in the docs it is given you can add validation set directly.

nishith006 · March 30, 2020, 7:58am

Sure I will check it out