code: def is_pos_real(s):
      """Returns True if s is a positive real."""
      try:
          return float(s) > 0
      except ValueError:
          return False
  
imports: from __future__ import division, print_function
  import sys
  import matplotlib.cm
  import matplotlib.pyplot
  import matplotlib.collections
  import numpy
  from scipy.spatial.distance import cdist
label_desc: Use image node_id 1 for calling a global function with example usage: is_pos_real(s) and returns: unknown, False