Async Python src block behavior with :dir header property

[Nasser Alkmim]

Hi,

I'm in the latest Emacs GUI.
This works, the =return figname= apparently can recognizee that we are in the 
=:dir=.

#+begin_src python :dir asyncpy :return figname :results file value
import matplotlib.pyplot as plt
plt.figure(figsize=(4*.5, 3*.5))
plt.plot([1, 2])
figname = 'fig.svg'
plt.savefig(figname, transparent=True, bbox_inches='tight')
#+end_src


This does not work.
Even though the python execution is in the right directory and the file is 
saved correctly.
The =return= does not produces the right file path considering the directory.

#+begin_src python :dir asyncpy :async :session :return figname :results file 
value
import matplotlib.pyplot as plt
plt.figure(figsize=(4*.5, 3*.5))
plt.plot([1, 2])
figname = 'fig.svg'
plt.savefig(figname, transparent=True, bbox_inches='tight')
#+end_src

If we inform the right path to the return statement, it works.

#+begin_src python :dir asyncpy :async :session :epilogue 
figdir='asyncpy/'+figname :return figdir :results file value
import matplotlib.pyplot as plt
plt.figure(figsize=(4*.5, 3*.5))
plt.plot([1, 2])
figname = 'fig.svg'
plt.savefig(figname, transparent=True, bbox_inches='tight')
#+end_src

Another alternative, we can use the =os= package to get the current directory.

#+header: :epilogue import os;figdir=os.getcwd()+'/'+figname 
#+begin_src python :dir asyncpy :async :session :return figdir :results file 
value
import matplotlib.pyplot as plt
plt.figure(figsize=(4*.5, 3*.5))
plt.plot([1, 2])
figname = 'fig.svg'
plt.savefig(figname, transparent=True, bbox_inches='tight')
#+end_src

Is this behavior as expected?
Is there a better way to have the figures from the python block with async 
execution?

-- 
Nasser Alkmim 
 +43 677 6408 9171