Django could not read for most of his life. Period...
He was taught to read by Stéphane Grappelli!
QUOTE:
<< Although he could not read music, Reinhardt composed several winsome, highly original tunes like "Daphne," "Nuages" and "Manoir de Mes Reves," as well as mad swingers like "Minor Swing" and the ode to his record label of the '30s, "Stomping at Decca." >>
And some more..
http://www.guitarnoise.com/lesson/tyranny-of-tablature/