code: def git_pull():
      import git
  
      os.chdir(conda_prefix + "/blazingsql-testing-files")
  
imports: from blazingsql import BlazingContext
  from blazingsql import DataType, S3EncryptionType
  import numpy
  import pandas
  import os
  import subprocess
  import sys
  from EndToEndTests import tpchQueries
label_desc: Use image node_id 3 for calling a global function with example usage: git_pull() without return types