[Puppet Users] Is there a more elegant way of declaring this variable and its value?

[Fabien Delpierre]

Hey folks,
I have something like this in a manifest:

class foo(
  $python_pips   = {
    pbr => { ensure => '1.3.0', install_args => ['-I'] },
    linecache2 => { ensure => '1.0.0', install_args => ['-I'] },
    elasticsearch => { ensure => '1.6.0', install_args => ['-I'] },
  },
  ) {
  require python
  create_resources('python::pip', $python_pips)
}

I'm using this module: https://github.com/stankevich/puppet-python

I'm wondering if there's a more elegant way of telling the python::pip 
resource to use the -I flag when installing those three pip packages.
It's going to get even uglier since the $python_pips variable will 
ultimately live in Hiera, and I have some environments that require a proxy 
to access the Internet, so in Hiera for those environments it's going to 
look like this:

foo::python_pips:
  "pbr":
    ensure: 1.3.0
    install_args: ['-I']
    proxy: 'http://proxy.example.com:3128";
  "linecache2":
    ensure: 1.0.0
    install_args: ['-I']
    proxy: "http://proxy.example.com:3128";
  "elasticsearch":
    ensure: 1.6.0
    install_args: ['-I']
    proxy: "http://proxy.example.com:3128";

I don't like all this repetition. Wanted to double check if I can make this 
easier on the eyes before I move on. 
I appreciate any input!

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