Hi folks, 

I try to use the PDF backend in my plotting script, when I expect to have a pdf figure. However, when I open the figure in Adobe Illustrator, it turns out that the fonts are not "real fonts". I mean I want to be able to directly edit them. For example, when I double click the fonts or use other ways, I want to edit the fonts without deleting them and replacing with new ones. Am I missing something or not doing it correctly? 

# use PDF backends 
import matplotlib
import matplotlib.pyplot as plt
fig = plt.figure()