code.py should use ArgumentType.PYSLICE instead of ArgumentType.SLICE

[iamsleepy]

Check below:

sip/sipbuild/generator/outputs/code/code.py

Line 4836 in 4f0ca7f

if arg.type in (ArgumentType.PYTUPLE, ArgumentType.PYLIST, ArgumentType.PYDICT, ArgumentType.SLICE, ArgumentType.PYTYPE):