[Examples] fix path for load_graph (#3797)

examples/pytorch/graphsage/advanced/train_lightning.py

@@ -11,7 +11,7 @@ import tqdm
 import glob
 import os
 import sys
-sys.path.append('../')
+sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
 from load_graph import load_reddit, inductive_split, load_ogb
 
 from torchmetrics import Accuracy

examples/pytorch/graphsage/advanced/train_lightning_unsupervised.py

@@ -18,7 +18,7 @@ from pytorch_lightning.callbacks import ModelCheckpoint, Callback
 from pytorch_lightning import LightningDataModule, LightningModule, Trainer
 from model import SAGE, compute_acc_unsupervised as compute_acc
 import sys
-sys.path.append('../')
+sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
 from load_graph import load_reddit, inductive_split, load_ogb
 
 class CrossEntropyLoss(nn.Module):

examples/pytorch/graphsage/advanced/train_sampling_unsupervised.py

@@ -15,7 +15,7 @@ from torch.nn.parallel import DistributedDataParallel
 from model import SAGE, compute_acc_unsupervised as compute_acc
 from negative_sampler import NegativeSampler
 import sys
-sys.path.append('../')
+sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
 from load_graph import load_reddit, load_ogb
 
 class CrossEntropyLoss(nn.Module):

examples/pytorch/graphsage/dist/partition_graph.py

@@ -4,7 +4,8 @@ import torch as th
 import argparse
 import time
 import sys
-sys.path.append('../')
+import os
+sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
 from load_graph import load_reddit, load_ogb
 
 if __name__ == '__main__':

examples/pytorch/graphsage/distgnn/partition_graph.py

@@ -19,7 +19,7 @@ from statistics import mean
 import random
 import time
 import argparse
-sys.path.append('../')
+sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
 from load_graph import load_ogb
 import dgl
 from dgl.data import load_data