TensorFlow 1 version View source on GitHub

Draws shape samples from each of the given Poisson distribution(s).

    shape, lam, dtype=tf.dtypes.float32, seed=None, name=None

lam is the rate parameter describing the distribution(s).


samples = tf.random.poisson([10], [0.5, 1.5])
# samples has shape [10, 2], where each slice [:, 0] and [:, 1] represents
# the samples drawn from each distribution

samples = tf.random.poisson([7, 5], [12.2, 3.3])
# samples has shape [7, 5, 2], where each slice [:, :, 0] and [:, :, 1]
# represents the 7x5 samples drawn from each of the two distributions


  • shape: A 1-D integer Tensor or Python array. The shape of the output samples to be drawn per "rate"-parameterized distribution.
  • lam: A Tensor or Python value or N-D array of type dtype. lam provides the rate parameter(s) describing the poisson distribution(s) to sample.
  • dtype: The type of the output: float16, float32, float64, int32 or int64.
  • seed: A Python integer. Used to create a random seed for the distributions. See tf.compat.v1.set_random_seed for behavior.
  • name: Optional name for the operation.


  • samples: a Tensor of shape tf.concat([shape, tf.shape(lam)], axis=0) with values of type dtype.