import tensorflow as tf
n1 = tf.constant(2)
n2 = tf.constant(3)
n3 = tf.constant(4)
def cond1(i, a, b):
return i < n1
def cond2(i, a, b):
return i < n2
def cond3(i, a, b):
return i < n3
def body(i, a, b):
return i + 1, b, a + b
i1, a1, b1 = tf.while_loop(cond1, body, (2, 1, 1))
i2, a2, b2 = tf.while_loop(cond2, body, (2, 1, 1))
i3, a3, b3 = tf.while_loop(cond3, body, (2, 1, 1))
sess = tf.Session()
print(sess.run(i1))
print(sess.run(a1))
print(sess.run(b1))
print("-")
print(sess.run(i2))
print(sess.run(a2))
print(sess.run(b2))
print("-")
print(sess.run(i3))
print(sess.run(a3))
print(sess.run(b3))
print结果：
2
1
1
-
3
1
2
-
4
2
3
可见body函数返回的三个变量又传给了body
改自 https://github.com/vahidk/EffectiveTensorflow
