Source virtualenvwrapper in python module

modules/python/init.zsh

@@ -3,6 +3,7 @@
 #
 # Authors:
 #   Sorin Ionescu <sorin.ionescu@gmail.com>
+#   Sebastian Wiesner <lunaryorn@googlemail.com>
 #
 
 # Prepend PEP 370 per user site packages directory, which defaults to
@@ -16,3 +17,8 @@ else
   manpath=($HOME/.local/{,share/}man(N) $manpath)
 fi
 
+# Load virtualenvwrapper into the shell session.
+if [[ -n "$WORKON_HOME" ]] && (( $+commands[virtualenvwrapper.sh] )); then
+  source "$commands[virtualenvwrapper.sh]"
+fi
+