How to use a sequence as dict key?

Numba Support: How do I do ...?
12

This probably does what you want, but note it’s using “unsafe” Numba-internal things:

from numba import njit
import numpy as np
from numba.cpython.unsafe.tuple import tuple_setitem

@njit
def drop_elements(tup: tuple):
    for x in range(len(tup)):
        empty = tup[:-1] # it's not empty, but its the right size and will be mutated
        idx = 0
        for i in range(len(tup)):
            if i != x:
                empty = tuple_setitem(empty, idx, tup[i])
                idx += 1
        yield tup[x], empty

z = [x for x in drop_elements((1,2,3))]
print(z)

the reason the expression yield element, tup[:i] + tup[i+1:] won’t compile is that i isn’t constant and so Numba can’t work out what size the tuple resulting from tup[:i] should be, essentially, dynamic slicing of tuples isn’t supported.