Split custom pytorch dataset

import torch
import numpy as np
from torchvision import datasets
from torchvision import transforms
from torch.utils.data.sampler import SubsetRandomSampler

class CustomDatasetFromCSV(Dataset):
    def __init__(self, csv_path, transform=None):
        ....


dataset = CustomDatasetFromCSV(my_path)
batch_size = 16
validation_split = .2
shuffle_dataset = True
random_seed= 42

# Creating data indices for training and validation splits:
dataset_size = len(dataset)
indices = list(range(dataset_size))
split = int(np.floor(validation_split * dataset_size))
if shuffle_dataset :
    np.random.seed(random_seed)
    np.random.shuffle(indices)
train_indices, val_indices = indices[split:], indices[:split]

# Creating PT data samplers and loaders:
train_sampler = SubsetRandomSampler(train_indices)
valid_sampler = SubsetRandomSampler(val_indices)

train_loader = torch.utils.data.DataLoader(dataset, batch_size=batch_size, 
                                           sampler=train_sampler)
validation_loader = torch.utils.data.DataLoader(dataset, batch_size=batch_size,
                                                sampler=valid_sampler)

# Usage Example:
num_epochs = 10
for epoch in range(num_epochs):
    # Train:   
    for batch_index, (faces, labels) in enumerate(train_loader):
        # ...

Source: stackoverflow.com

Similar codes

68 votes200 views5 answers
Python main method
Python
0 vote170 views2 answers
Composition in python
Python
1 vote218 views1 answer
Set size of button tkinter
Python
0 vote191 views1 answer
Python is program running
Python
3 votes201 views2 answers
Python list copy
Python
0 vote211 views1 answer
Migrations.rename_field django
Python Django
0 vote162 views1 answer
Remove a columns in pandas
Python
0 vote187 views1 answer
How to make a instagram report bot python
Python
3 votes158 views5 answers
Pandas split column into multiple columns
Python
0 vote159 views1 answer
Merge_sort
Python