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# Amazon Neptune version 4 signing example (version v2)

# The following script requires python 3.6+
#    (sudo yum install python36 python36-virtualenv python36-pip)
# => the reason is that we're using urllib.parse() to manually encode URL
#    parameters: the problem here is that SIGV4 encoding requires whitespaces
#    to be encoded as %20 rather than not or using '+', as done by previous/
#    default versions of the library.