tf.get_variable的初始化調(diào)用為：
tf.get_variable(name, shape=None, initializer=None, dtype=tf.float32, trainable=True, collections=None)
其中initializer就是變量初始化的方法，初始化的方式有以下種類：
initializer = tf.constant_initializer(const)：常量初始化函數(shù)
initializer = tf.random_normal_initializer()：正態(tài)分布初始化函數(shù)
initializer = tf.truncated_normal_initializer(mean = 0.0, stddev = 1.0, seed = None, dtype = dtypes.float32)：截取的正態(tài)分布初始化函數(shù)
initializer = tf.random_uniform_initializer(minval = 0, maxval = None, seed = None, dtype = dtypes.float32)：均勻分布初始化函數(shù)
initializer = tf.zeros_initializer()：全0常量初始化函數(shù)
initializer = tf.ones_initializer()：全1常量初始化函數(shù)
initializer = tf.uniform_unit_scaling_initializer(factor = 1.0, seed = None, dtype = dtypes.float32)：均勻分布（不指定最小、最大值），初始化函數(shù)
initializer = tf.variance_scaling_initializer(scale = 1.0, mode = "fan_in", distribution = "normal", seed = None, dtype = dtypes.float32)：由mode確定是截取的正態(tài)分布，還是均勻分布初始化函數(shù)
initializer = tf.orthogonal_initializer()：正交矩陣初始化函數(shù)
initializer = tf.glorot_uniform_initializer()：由輸入單元節(jié)點(diǎn)數(shù)和輸出單元節(jié)點(diǎn)數(shù)確定的均勻分布初始化函數(shù)
initializer = tf.glorot_normal_initializer()：由輸入單元節(jié)點(diǎn)數(shù)和輸出單元節(jié)點(diǎn)數(shù)確定的截取的正態(tài)分布初始化函數(shù)
PS: tf.get_variable中initializer的初始化不需要再指定shape了，已經(jīng)在外面指定。
基本的變量初始化為：
tf.ones(shape, dtype = tf.float32, name = None)
tf.zeros(shape, dtype = tf.float32, name = None)
tf.ones_like(tensor, dtype = None, name = None)
tf.zeros_like(tensor, dtype = None, name = None)
tf.fill(dim, value, name = None)
tf.constant(value, dtype = None, shape = None, name = None)
tf.linspace(start, stop, num, name = None)
tf.range(start, limit = None, delta = 1, name = None)
tf.random_normal(shape, mean = 0.0, stddev = 1.0, dtype = tf.float32, seed = None, name = None)
tf.truncated_normal(shape, mean = 0.0, stddev = 1.0, dtype = tf.float32, seed = None, name = None)
tf.random_uniform(shape, minval = 0, maxval = None, dtype = tf.float32, seed = None, name = None)
tf.random_shuffle(value, seed =None, name = None)
tf.set_random_seed(seed)：設(shè)置產(chǎn)生隨機(jī)數(shù)的種子
例如：
tf.set_random_seed(123456789)
varA = tf.random_normal([1.0])
