code: def main():
      ll = 0
      n = 0
      # Iterating over the 7 test days
      for day in range(54, 61):
          ll_day, n_day = train_test_oneday(day)
          ll += ll_day
          n += n_day
          print(ll_day, n_day)
      print()
      print("Average test log likelihood: %f" % (ll / n))
  
imports: import sys
  from subprocess import call, Popen, PIPE
  from math import log, exp
  from os import devnull
label_desc: Use image node_id 3 for calling a global function with example usage: main() without return types