SSL context is not supported on Python < 3.4.3

[farzadghanei]

$ python3 -m elasticmetrics.tool --ssl --insecure
[WARNING] elasticmetrics.tool: disabled SSL certificate verification. requests are insecure
[ERROR] elasticmetrics.tool: urlopen() got an unexpected keyword argument 'context'
$ python3 --version
Python 3.4.2

according to docs context is added from 3.4.3