code: def cxBlend(ind1, ind2, alpha):
      """Executes a blend crossover that modify in-place the input individuals.
      The blend crossover expects :term:`sequence` individuals of floating point
      numbers.
  
      :param ind1: The first individual participating in the crossover.
      :param ind2: The second individual participating in the crossover.
      :param alpha: Extent of the interval in which the new values can be drawn
                    for each attribute on both side of the parents' attributes.
      :returns: A tuple of two individuals.
  
      This function uses the :func:`~random.random` function from the python base
      :mod:`random` module.
      """
      for i, (x1, x2) in enumerate(zip(ind1, ind2)):
          gamma = (1.0 + 2.0 * alpha) * random.random() - alpha
          ind1[i] = (1.0 - gamma) * x1 + gamma * x2
          ind2[i] = gamma * x1 + (1.0 - gamma) * x2
  
      return ind1, ind2
  
file_path: deap/deap/tools/crossover.py
imports: import random
  import warnings
  from itertools import repeat
label_desc: Use image node_id 8 for calling a global function with example usage: cxBlend(ind1, ind2, alpha) and returns: ind1,  ind2