Shapes.reduceDims is difficult to understand

I find the documentation opaque:

  /**
   * Reshapes the operand by reducing the shape to the specified axis.
   *
   * @param <T> the type of Operand
   * @param scope current scope
   * @param operand the operand
   * @param axis the axis
   * @return the reshaped operand
   */
  @Endpoint(name = "reduceDims")
  public static <T extends TType> Operand<T> reduceDims(
      Scope scope, Operand<T> operand, Operand<TInt32> axis) {

I had no success searching for a similar function in Python TensorFlow. So I read the code, but it is fairly complex to follow.

从 Shapes.reduceDims 方法开始，阅读其当前的 Javadoc 和实现。将该操作与可用的 TensorFlow 行为进行比较，然后更新文档，使 reshape、axis、operand 以及结果 shape 都易于理解；当读者无需跟踪复杂代码即可弄清 reduceDims 的行为时，即可完成。