code: def download(dataset, datadir):
      os.makedirs(datadir)
      url = "https://ls11-www.cs.tu-dortmund.de/people/morris/graphkerneldatasets/{0}.zip".format(
          dataset
      )
      zipfile = os.path.basename(url)
      os.system("wget {0}; unzip {1}".format(url, zipfile))
      os.system("mv {0}/* {1}".format(dataset, datadir))
      os.system("rm -r {0}".format(dataset))
      os.system("rm {0}".format(zipfile))
  
file_path: dgl/examples/pytorch/mvgrl/graph/dataset.py
imports: import os
  import re
  from collections import Counter
  import dgl
  import networkx
  import numpy
  import torch
  from dgl.data import DGLDataset
  from scipy.linalg import fractional_matrix_power, inv
label_desc: Use image node_id 2 for calling a global function with example usage: download(dataset, datadir) without return types