EDIT: As pointed by @Petesh, the issue comes from stompy
(external library), which hasn’t been ported to Python3.
If you check the source code, you can find this:
except socket.timeout, exc:
which is invalid syntax for python3+
If you run your Lambdas in python3.6/3.7 environment, the syntax is invalid.
The issue might go away if you choose python 2.7, but you will also have to adjust your code, libraries, etc.
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solved AWS | Syntax error in module’: invalid syntax