I am using import to load packages with python.

import torch
import utils

import torch.nn as nn
import torch.nn.functional as F

from torch_geometric.nn.conv import MessagePassing, GCNConv, GATConv
from layers import *

import math 

from torch_scatter import scatter
from torch_geometric.utils import softmax

But I got following error.
OSError: [WinError 126] The specified module could not be found

The environment is python 3.7,pytorch 1.4.0.I have correctly installed packages through pip.
It seems that the error is in the init file of torch_sparse, but i don’t understand why it happened.