Use of bare except clause in convert_concat

[bourcierj]

In reshape_layers.convert_concat function, there is an except clause that catches every exception (link). What is the type of exception encountered and when does this happen ? This clause should be restricted to expected types of exceptions.

Also, if an exception is raised, it falls back to using a keras Lambda layer with a custom function with tf.concat. The use of Lambda layers should be avoided. Hence the need to specify the kind of exception that can be caught in order to find a better solution.