code: def get_oblv_public_key(key_name):
      try:
          filepath = os.path.join(
              os.path.expanduser("~"),
              ".ssh",
              key_name,
              key_name + "_public.der",
          )
          with open(filepath, "rb") as f:
              public_key = f.read()
          public_key = (
              base64.encodebytes(public_key)
              .decode("UTF-8")
              .replace("\n", "")
          )
          return public_key
      except FileNotFoundError:
          print(
              bcolors.RED
              + bcolors.BOLD
              + "Exception"
              + bcolors.BLACK
              + bcolors.ENDC
              + ": "
              + "No key found with given name",
              file=sys.stderr,
          )
          raise FileNotFoundError
      except Exception as e:
          raise Exception(e)
  
file_path: PySyft/packages/syft/src/syft/external/oblv/oblv_proxy.py
imports: import base64
  import os
  import platform
  import subprocess
  import sys
  import tarfile
  import zipfile
  import requests
  from ...util.util import bcolors
label_desc: Use image node_id 7 for calling a global function with example usage: get_oblv_public_key(key_name) and returns: public_key