Diff to fix puppet 3.x.x talking to Pypi after they changed their infrastructure (to do the right thing) on 2018-04-17

puppet_prov_pkg_pip.diff

diff --git i/lib/puppet/provider/package/pip.rb w/lib/puppet/provider/package/pip.rb
index 8e889a0b1..0204b17d0 100644
--- i/lib/puppet/provider/package/pip.rb
+++ w/lib/puppet/provider/package/pip.rb
@@ -68,6 +68,9 @@ Puppet::Type.type(:package).provide :pip,

     client = XMLRPC::Client.new2("http://pypi.python.org/pypi", proxy)
     client.http_header_extra = {"Content-Type" => "text/xml"}
+    # also add an accept header, as the pypi infra changed and now they
+    # will gzip the response, which xmlrpc client will not handle.
+    client.http_header_extra = {"Accept-Encoding" => "text/xml"}
     client.timeout = 10
     result = client.call("package_releases", @resource[:name])
     result.first