Symbol's function definition is void: yas/initialize

[jccode]

Hello gabrielelanaro,
The "emacs-for-python" is so useful for python developer, thanks for your great work.
I found the function yas/initialize is not available in the latest yasnippet, which rename to yas--initialize already. It lead to the errors as below

Debugger entered--Lisp error: (void-function yas/initialize)
  (yas/initialize)
  eval-buffer(#<buffer  *load*<3>> nil "/home/jcchen/emacs/plugins/emacs-for-python/epy-editing.el" nil t)  ; Reading at buffer position 846
  load-with-code-conversion("/home/jcchen/emacs/plugins/emacs-for-python/epy-editing.el" "/home/jcchen/emacs/plugins/emacs-for-python/epy-editing.el" nil t)
  require(epy-editing)

It's annoying that the changes of public interface lead to the incompatible problem.
Could you help to do some change to adaptive the latest yasnippet if you have time.

Thank you!

[sambrightman]

This is caused by backwards-compatibility oversight in yasnippet, now fixed by joaotavora/yasnippet#546.