Study shows snake's ability to learn.

[Amadeus]

In my opinion for something to "learn" it must be sentient being.

Example, it has been well documented that primates can learn and solve problems but we know that they have higher brain function and their own kind of emotion, but a snake is known to have limited cognitive capabilities and it is illogical to assume that they can ''learn" as we think of it but rather develop a means to continue living.