tensorflow: WARNING:tensorflow:Entity at 0x000002343DCF24C8> could not be transformed and will be executed as-is.

What can be done to solve this warning?

Warning message

Below is the full warning:

WARNING:tensorflow:Entity <function <lambda> at 0x000002343DCF24C8> could not be transformed and will be executed as-is. Please report this to the AutoGraph team. When filing the bug, set the verbosity to 10 (on Linux, export AUTOGRAPH_VERBOSITY=10) and attach the full output. Cause: module ‘gast’ has no attribute ‘Str’ WARNING: Entity <function <lambda> at 0x000002343DCF24C8> could not be transformed and will be executed as-is. Please report this to the AutoGraph team. When filing the bug, set the verbosity to 10 (on Linux, export AUTOGRAPH_VERBOSITY=10) and attach the full output. Cause: module ‘gast’ has no attribute ‘Str’

Minimum working example

The code that generated the warning was discussed in #38471 and stored in this gist.

import tensorflow as tf

def compute_length(x): 
    return tf.strings.length(x)

def check_substring(x, substring):
    return tf.strings.regex_full_match(x,substring)


def compute_palindrome(x):
    extra_split = tf.strings.bytes_split(x)
    reverse = tf.reverse(extra_split,[0])
    reversedStr = tf.strings.reduce_join([reverse])
    return reversedStr
    
ds = tf.data.Dataset.from_tensor_slices(["Ottawa", "Stockholm", "Rabat"])

ds = ds.map(
    lambda city: (city, 
                  compute_length(city), 
                  check_substring(city, ".*lm.*"),
                  compute_palindrome(city),
                  ),
        )

num_elems = len(ds.element_spec)
for elem in ds:
   print(''.join([f"{elem[i]}" for i in range(num_elems)]))

Environment

• python 3.7.4
• tensorflow-gpu 2.0.0
• tensorflow-datasets 1.3.0
• gast 0.2.2

Running on Windows 10 under conda 4.8.3.