如何通过tensorflow中的索引来获取元素？

import tensorflow as tf

tensor = tf.constant([[1, 2, 3], [4, 5, 6]])
element = tensor[0, 1]  # 获取第0行第1列的元素
print(element)  # 输出：2

import tensorflow as tf

tensor = tf.constant([1, 2, 3, 4, 5, 6])
elements = tensor[1:4:2]  # 获取索引为1和3的元素
print(elements)  # 输出：[2, 4]

import tensorflow as tf

tensor = tf.constant([1, 2, 3, 4, 5, 6])
condition = tf.constant([True, False, True, False, True, False])
elements = tensor[condition]  # 获取满足条件的元素
print(elements)  # 输出：[1, 3, 5]