from _erg_range import (
    Range,
    LeftOpenRange,
    RightOpenRange,
    OpenRange,
    ClosedRange,
    RangeIterator,
)
from _erg_result import Error, is_ok
from _erg_float import Float, FloatMut
from _erg_int import Int, IntMut
from _erg_nat import Nat, NatMut
from _erg_bool import Bool
from _erg_bytes import Bytes
from _erg_str import Str, StrMut
from _erg_array import Array
from _erg_dict import Dict
from _erg_set import Set
from _erg_contains_operator import contains_operator
from _erg_mutate_operator import mutate_operator

Record = tuple

class Never:
    pass