How to use the randomgen.ChaCha function in randomgen

PCG64DXSM,
    RDRAND,
    SFC64,
    SFMT,
    SPECK128,
    AESCounter,
    ChaCha,
    Philox,
    Romu,
    ThreeFry,
    Xoshiro256,
    Xoshiro512,
)


class ChaCha8(ChaCha):
    canonical_repr = "ChaCha(rounds=8)"

    def __init__(self, *args, **kwargs):
        if "rounds" in kwargs:
            del kwargs["rounds"]
        super().__init__(*args, rounds=8, **kwargs)


class JSF32(JSF):
    def __init__(self, *args, **kwargs):
        if "size" in kwargs:
            del kwargs["size"]
        super().__init__(*args, size=32, **kwargs)


class Philox4x32(Philox):

SFC64,
    SFMT,
    SPECK128,
    AESCounter,
    ChaCha,
    LCG128Mix,
    Philox,
    Romu,
    ThreeFry,
    Xoshiro256,
    Xoshiro512,
)

ALL_BIT_GENS = [
    AESCounter,
    ChaCha,
    DSFMT,
    EFIIX64,
    HC128,
    JSF,
    LXM,
    PCG64,
    LCG128Mix,
    MT19937,
    Philox,
    SFC64,
    SFMT,
    SPECK128,
    ThreeFry,
    Xoshiro256,
    Xoshiro512,
    Romu,

ChaCha8,
    JSF32,
    Philox4x32,
    ThreeFry2x64,
    ThreeFry4x32,
    Philox2x64,
    DSFMT,
    MT64,
    MT19937,
    PCG64,
    PCG64DXSM128,
    PCG64DXSM,
    LXM,
    SFMT,
    AESCounter,
    ChaCha,
    Philox,
    ThreeFry,
    Xoshiro256,
    Xoshiro512,
    JSF,
    Romu,
    RomuTrio,
    HC128,
    SPECK128,
    SFC64,
    EFIIX64,
]

if HAS_RDRND:
    PRNGS.append(RDRAND)