diff --git a/inc/python b/inc/python
index e4cfab803c..54fd90533a 100644
--- a/inc/python
+++ b/inc/python
@@ -76,6 +76,27 @@ function get_python_versions_for_package {
         | grep 'Language' | cut -f5 -d: | grep '\.' | tr '\n' ' '
 }
 
+# Check for python3 classifier in local directory
+function check_python3_support_for_package_local {
+    local name=$1
+    cd $name
+    set +e
+    classifier=$(python setup.py --classifiers \
+        | grep 'Programming Language :: Python :: 3$')
+    set -e
+    echo $classifier
+}
+
+# Check for python3 classifier on pypi
+function check_python3_support_for_package_remote {
+    local name=$1
+    set +e
+    classifier=$(curl -s -L "https://pypi.python.org/pypi/$name/json" \
+        | grep '"Programming Language :: Python :: 3"')
+    set -e
+    echo $classifier
+}
+
 # Wrapper for ``pip install`` to set cache and proxy environment variables
 # Uses globals ``OFFLINE``, ``PIP_VIRTUAL_ENV``,
 # ``PIP_UPGRADE``, ``TRACK_DEPENDS``, ``*_proxy``,
@@ -123,9 +144,39 @@ function pip_install {
                 # default pip
                 local package_dir=${!#}
                 local python_versions
-                if [[ -d "$package_dir" ]]; then
+
+                # Special case some services that have experimental
+                # support for python3 in progress, but don't claim support
+                # in their classifier
+                echo "Check python version for : $package_dir"
+                if [[ ${package_dir##*/} == "nova" || ${package_dir##*/} == "glance" || ${package_dir##*/} == "cinder" ]]; then
+                    echo "Using $PYTHON3_VERSION version to install $package_dir"
+                    sudo_pip="$sudo_pip LC_ALL=en_US.UTF-8"
+                    cmd_pip=$(get_pip_command $PYTHON3_VERSION)
+                elif [[ -d "$package_dir" ]]; then
                     python_versions=$(get_python_versions_for_package $package_dir)
                     if [[ $python_versions =~ $PYTHON3_VERSION ]]; then
+                        echo "Using $PYTHON3_VERSION version to install $package_dir"
+                        sudo_pip="$sudo_pip LC_ALL=en_US.UTF-8"
+                        cmd_pip=$(get_pip_command $PYTHON3_VERSION)
+                    else
+                        # The package may not have yet advertised python3.5
+                        # support so check for just python3 classifier and log
+                        # a warning.
+                        python3_classifier=$(check_python3_support_for_package_local $package_dir)
+                        if [[ ! -z "$python3_classifier" ]]; then
+                            echo "Using $PYTHON3_VERSION version to install $package_dir"
+                            sudo_pip="$sudo_pip LC_ALL=en_US.UTF-8"
+                            cmd_pip=$(get_pip_command $PYTHON3_VERSION)
+                        fi
+                    fi
+                else
+                    # Check pypi as we don't have the package on disk
+                    package=$(echo $package_dir | grep -o '^[.a-zA-Z0-9_-]*')
+                    python3_classifier=$(check_python3_support_for_package_remote $package)
+                    if [[ ! -z "$python3_classifier" ]]; then
+                        echo "Using $PYTHON3_VERSION version to install $package"
+                        sudo_pip="$sudo_pip LC_ALL=en_US.UTF-8"
                         cmd_pip=$(get_pip_command $PYTHON3_VERSION)
                     fi
                 fi
diff --git a/lib/apache b/lib/apache
index 2dc626f130..d1a11ae18b 100644
--- a/lib/apache
+++ b/lib/apache
@@ -71,7 +71,15 @@ function install_apache_wsgi {
     # Apache installation, because we mark it NOPRIME
     if is_ubuntu; then
         # Install apache2, which is NOPRIME'd
-        install_package apache2 libapache2-mod-wsgi
+        install_package apache2
+        if python3_enabled; then
+            if is_package_installed libapache2-mod-wsgi; then
+                uninstall_package libapache2-mod-wsgi
+            fi
+            install_package libapache2-mod-wsgi-py3
+        else
+            install_package libapache2-mod-wsgi
+        fi
     elif is_fedora; then
         sudo rm -f /etc/httpd/conf.d/000-*
         install_package httpd mod_wsgi
diff --git a/lib/horizon b/lib/horizon
index 830da095f6..4cabbe483c 100644
--- a/lib/horizon
+++ b/lib/horizon
@@ -81,7 +81,11 @@ function configure_horizon {
     # Horizon is installed as develop mode, so we can compile here.
     # Message catalog compilation is handled by Django admin script,
     # so compiling them after the installation avoids Django installation twice.
-    (cd $HORIZON_DIR; python manage.py compilemessages)
+    if python3_enabled; then
+        (cd $HORIZON_DIR; python${PYTHON3_VERSION} manage.py compilemessages)
+    else
+        (cd $HORIZON_DIR; python manage.py compilemessages)
+    fi
 
     # ``local_settings.py`` is used to override horizon default settings.
     local local_settings=$HORIZON_DIR/openstack_dashboard/local/local_settings.py
@@ -162,7 +166,11 @@ function install_django_openstack_auth {
         git_clone_by_name "django_openstack_auth"
         # Compile message catalogs before installation
         _prepare_message_catalog_compilation
-        (cd $dir; python setup.py compile_catalog)
+        if python3_enabled; then
+            (cd $dir; python${PYTHON3_VERSION} setup.py compile_catalog)
+        else
+            (cd $dir; python setup.py compile_catalog)
+        fi
         setup_dev_lib "django_openstack_auth"
     fi
     # if we aren't using this library from git, then we just let it
diff --git a/stackrc b/stackrc
index ae87b22e13..cb9b8176ca 100644
--- a/stackrc
+++ b/stackrc
@@ -101,12 +101,12 @@ if [[ -r $RC_DIR/.localrc.password ]]; then
 fi
 
 # Control whether Python 3 should be used.
-export USE_PYTHON3=${USE_PYTHON3:-False}
+export USE_PYTHON3=$(trueorfalse False USE_PYTHON3)
 
 # When Python 3 is supported by an application, adding the specific
 # version of Python 3 to this variable will install the app using that
 # version of the interpreter instead of 2.7.
-export PYTHON3_VERSION=${PYTHON3_VERSION:-3.4}
+export PYTHON3_VERSION=${PYTHON3_VERSION:-3.5}
 
 # Just to be more explicit on the Python 2 version to use.
 export PYTHON2_VERSION=${PYTHON2_VERSION:-2.7}