tf.cast(x, dtype, name=None) //此函式是型別轉換函式，把x的型別轉換成dtype指定的型別

Args:

x: A Tensor or SparseTensor.
dtype: The destination type.
name: A name for the operation (optional).
Returns:

A Tensor or SparseTensor with same shape as x.

Raises:

TypeError: If x cannot be cast to the dtype.

• x：輸入
• dtype：轉換目標型別
• name：名稱

#將0/1轉換成bool型別

import tensorflow as tf

a = tf.Variable([1,0,0,1,1])
b = tf.cast(a,dtype=tf.bool)
sess = tf.Session()
sess.run(tf.initialize_all_variables())
print(sess.run(b))
#[ True False False  True  True]