nodes-vagrant.pp

class puppet {
  group { "puppet":
    ensure => present,
  }
}

class base {
  include pip, puppet 
}

class uwsgi {
  package { "uwsgi":
    require => Class['pip'],
    provider => pip,
    ensure => latest,
  }
}

node default {
  include base
  include uwsgi
}

results

[default] notice: /Group[puppet]/ensure: created
[default] 
[default] err: /Stage[main]/Uwsgi/Package[uwsgi]/ensure: change from absent to latest failed: Could not update: undefined method `pip' for #<Puppet::Type::Package::ProviderPip:0xb72b8998> at /tmp/vagrant-puppet/manifests/nodes-vagrant.pp:17
[default] 
[default] notice: /Stage[main]/Pip::Install/Package[python-pip]/ensure: ensure changed 'purged' to 'latest'
[default] 
[default] notice: Finished catalog run in 18.62 seconds
[default]