message: Doc py_function unknown shape
  Try to lower the rate of some recurrent tickets.
  See
diff: @@ -546,6 +546,30 @@ def py_func_common(func, inp, Tout, stateful=True, name=None):
  in that
  server (e.g. using `with tf.device():`).
  + * It produces tensors of unknown shape and rank as shape inference does not
  + work on arbitrary Python code.
  + If you need the shape you need to set it based on statically available information.
  +
  + E.g.
  + ```python
  + import tensorflow.compat.v2 as tf
  + import numpy as np
  +
  + #make magical data that requires python
  + def make_data(i):
  + return np.cast[np.uint8](i) * np.ones([20,256,256,3], dtype=np.float32) / 10.
  +
  + #clean up magical data
  + def make_clean_data(i):
  + ones = tf.py_function(make_data,[i],tf.float32)
  + ones.set_shape(tf.TensorShape([None, None, None, None]))
  + ones = tf.image.resize(ones, [224,224])
  + return ones
  +
  + ds = tf.data.Dataset.range(10)
  + ds = ds.map(make_clean_data)
  + ```
  +
  Args:
  func: A Python function, which accepts `ndarray` objects as arguments and
  returns a list of `ndarray` objects (or a single `ndarray`). This function
  