old_contents: #!/usr/bin/env python3
  
  import pickle
  import sys
  
  class Forecast:
      pass
  
  for fn in sys.argv:
      with open(fn,"rb") as fp:
          forecast = pickle.load(fp)
      print(dir(forecast))
  
new_contents: #!/usr/bin/env python3
  import astropy.time as time
  import datetime, os,math,sys
  import pickle
  import subprocess
  import matplotlib as mpl
  mpl.use('Agg')
  import matplotlib.pyplot as plt
  import matplotlib.dates as mdates
  
  
  class Forecast:
      pass
  
  for fn in sys.argv:
      with open(fn,"rb") as fp:
          forecast = pickle.load(fp)
      print(dir(forecast))
  
subject: Add an unarchiver