code: def _unicodify(s, encoding):
      if s is None:
          return None
      if isinstance(s, (unicode, int, float)):
          return s
      elif isinstance(s, str):
          return s.decode(encoding)
      return s
  
imports: import csv
  from textblob.compat import izip
label_desc: Use image node_id 3 for calling a global function with example usage: _unicodify(s, encoding) and returns: s, None, s, s