As discussed in #3926, the following files do not have .py extensions because TensorFlow does not yet support the current Python.

• dynamic_programming/k_means_clustering_tensorflow.py_tf
• machine_learning/lstm/lstm_prediction.py_tf
• neural_network/gan.py_tf
• neural_network/input_data.py_tf

TODO: Restore the .py file extensions

This is a reminder for me or a task if anyone wants :P

Basically, The last two questions aren't really regex's questions.

To do:

• Move said questions to correct place.
• Add new regex questions (Python related!)?
• Maybe add a new ## Regex section, as it is a valuable skill

We need to improve the comments explaining the main ideas / insights of the solution

A student should be able to get an anonymised link of their submission so that they could share it (e.g. on social network). The view would be a readonly view with the feedback of the submission still visible. The link should only contain the submission id.
There should be an option in the task conf to allow or not this feature on a par-task basis.
If an admin follow such a link, he should be r