1  from math import *
       2  
       3  nan = float('NaN')
       4  inf = float('Inf')
       5  
       6  def eq(left, right):
       7      return left == right
       8  
       9  def ne(left, right):
      10      return left != right
      11  
      12  def lt(left, right):
      13      return left < right
      14  
      15  def le(left, right):
      16      return left <= right
      17  
      18  def gt(left, right):
      19      return left > right
      20  
      21  def ge(left, right):
      22      return left >= right
      23  
      24  func_map = {
      25      "==": eq,
      26      "!=": ne,
      27      "< ": lt,
      28      "<=": le,
      29      "> ": gt,
      30      ">=": ge,
      31  }
      32  
      33  compare = [2.0, nan, -nan, inf, -inf]
      34  values = [nan, -nan, inf, -inf]
      35  
      36  for i in range(len(values)):
      37      for j in range(len(compare)):
      38          for op in func_map:
      39              print("%g %s %g -> %s" %
      40                      (values[i], op, compare[j], func_map[op](values[i], compare[j])))
      41  
      42          print("")