new_contents: #!/usr/bin/env python
  
  import sys
  import json
  import fileinput
  import dateutil.parser
  
  line_number = 0                                                                                                                                                                                        
  
  for line in fileinput.input():
      line_number += 1 
      try:
          tweet = json.loads(line)
      except Exception as e:
          sys.stderr.write("uhoh, we got a problem on line: %d\n%s\n" % (line_number, e))
  
subject: Add a little validation utility.