Le samedi 21 mars 2015, Serhiy Storchaka <storchaka@gmail.com> a écrit :

> For example binascii.crc32(). It has two positional parameters, one is mandatory, and one is optional with default value 0. With Argument Clinic its signature is crc32(data, crc=0, /). 

The \ is useful, it indicates that you cannot use keywords. If you want to drop \, modify the function to accept keywords.