Parse args

def parse_args():
    '''Parse args
    '''
    parser = argparse.ArgumentParser(description='Train and Test an Adversarial Variatiional Encoder')

    parser.add_argument('--train', help='train the network', action='store_true')
    parser.add_argument('--test', help='test the network', action='store_true')
    parser.add_argument('--save_embedding', help='saves the shape embedding of each input image', action='store_true')
    parser.add_argument('--dataset', help='dataset name', default='caltech', type=str)
    parser.add_argument('--activation', help='activation i.e. sigmoid or tanh', default='sigmoid', type=str)
    parser.add_argument('--training_data_path', help='training data path', default='datasets/caltech101/data/images32x32', type=str)
    parser.add_argument('--testing_data_path', help='testing data path', default='datasets/caltech101/test_data', type=str)
    parser.add_argument('--pretrained_encoder_path', help='pretrained encoder model path', default='checkpoints32x32_sigmoid/caltech_E-0045.params', type=str)
    parser.add_argument('--pretrained_generator_path', help='pretrained generator model path', default='checkpoints32x32_sigmoid/caltech_G-0045.params', type=str)
    parser.add_argument('--output_path', help='output path for the generated images', default='outputs32x32_sigmoid', type=str)
    parser.add_argument('--embedding_path', help='output path for the generated embeddings', default='outputs32x32_sigmoid', type=str)
    parser.add_argument('--checkpoint_path', help='checkpoint saving path ', default='checkpoints32x32_sigmoid', type=str)
    parser.add_argument('--nef', help='encoder filter count in the first layer', default=64, type=int)
    parser.add_argument('--ndf', help='discriminator filter count in the first layer', default=64, type=int)
    parser.add_argument('--ngf', help='generator filter count in the second last layer', default=64, type=int)
    parser.add_argument('--nc', help='generator filter count in the last layer i.e. 1 for grayscale image, 3 for RGB image', default=1, type=int)
    parser.add_argument('--batch_size', help='batch size, keep it 1 during testing', default=64, type=int)
    parser.add_argument('--Z', help='embedding size', default=100, type=int)
    parser.add_argument('--lr', help='learning rate', default=0.0002, type=float)
    parser.add_argument('--beta1', help='beta1 for adam optimizer', default=0.5, type=float)
    parser.add_argument('--epsilon', help='epsilon for adam optimizer', default=1e-5, type=float)
    parser.add_argument('--g_dl_weight', help='discriminator layer loss weight', default=1e-1, type=float)
    parser.add_argument('--gpu', help='gpu index', default=0, type=int)
    parser.add_argument('--use_cpu', help='use cpu', action='store_true')
    parser.add_argument('--num_epoch', help='number of maximum epochs ', default=45, type=int)
    parser.add_argument('--save_after_every', help='save checkpoint after every this number of epochs ', default=5, type=int)
    parser.add_argument('--visualize_after_every', help='save output images after every this number of epochs', default=5, type=int)
    parser.add_argument('--show_after_every', help='show metrics after this number of iterations', default=10, type=int)

    args = parser.parse_args()
    return args