code: def library(library_name, arctic):
      arctic.initialize_library(library_name)
      return arctic.get_library(library_name)
  
imports: import getpass
  import os
  import random
  import string
  import unittest
  import numpy
  import pandas
  import pytest
  from pandas.tseries.offsets import Day
  from past.utils import old_div
  from six import PY3
label_desc: Use image node_id 8 for calling a global function with example usage: library(library_name, arctic) and returns: arctic