code: def safe_float(string, default=None):
      
      value = default
      try:
          value = float(string)
      except TypeError:
          pass
      except ValueError:
          pass
      return value
docs: Safely parse a string into a float.
  
      On error return the ``default`` value.
  
      :param string string: string value to be converted
      :param float default: default value to be used in case of failure
      :rtype: float