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tf.abs()就是求数值的绝对值,可以将多个数值传入list,统一求绝对值
import tensorflow as tf
x = tf.constant(-1)
y = tf.constant([-1 + 2j, -2])
sess = tf.Session()
print(sess.run(tf.abs(x))) #1
print(sess.run(tf.abs(y))) #[ 2.23606798,2. ]