Specify src path for isort. (#8867)

demo/dask/cpu_survival.py

@@ -8,9 +8,9 @@ import os
 
 import dask.dataframe as dd
 from dask.distributed import Client, LocalCluster
-from xgboost.dask import DaskDMatrix
 
 import xgboost as xgb
+from xgboost.dask import DaskDMatrix
 
 
 def main(client):

demo/dask/cpu_training.py

@@ -5,9 +5,9 @@ Example of training with Dask on CPU
 """
 from dask import array as da
 from dask.distributed import Client, LocalCluster
-from xgboost.dask import DaskDMatrix
 
 import xgboost as xgb
+from xgboost.dask import DaskDMatrix
 
 
 def main(client):

demo/dask/dask_callbacks.py

@@ -6,9 +6,9 @@ import numpy as np
 from dask.distributed import Client, LocalCluster
 from dask_ml.datasets import make_regression
 from dask_ml.model_selection import train_test_split
-from xgboost.dask import DaskDMatrix
 
 import xgboost as xgb
+from xgboost.dask import DaskDMatrix
 
 
 def probability_for_going_backward(epoch):

demo/dask/gpu_training.py

@@ -7,10 +7,10 @@ from dask import array as da
 from dask import dataframe as dd
 from dask.distributed import Client
 from dask_cuda import LocalCUDACluster
-from xgboost.dask import DaskDMatrix
 
 import xgboost as xgb
 from xgboost import dask as dxgb
+from xgboost.dask import DaskDMatrix
 
 
 def using_dask_matrix(client: Client, X, y):