from numba import float32, float64, vectorize

@vectorize([float32, float32, float32, float32(float32, float32, float32, float32, float32, float32, float32, numba.float32),
            float64, float64, float64, float64(float64, float64, float64, float64, float64, float64, float64, numba.float64)])
def _cafec_coeff_ufunc(ET_bar,
                       PET_bar,
                       R_bar,
                       PR_bar,
                       L_bar,
                       PL_bar,
                       RO_bar,
                       PRO_bar):

    # calculate alpha
    if PET_bar == 0:
        if ET_bar == 0:
            alpha = 1
        else:
            alpha = 0
    else:
        alpha = ET_bar / PET_bar

    # calculate beta
    if PR_bar == 0:
        if R_bar == 0:
            beta = 1
        else:
            beta = 0
    else:
        beta = R_bar / PR_bar

    # calculate gamma
    if PRO_bar == 0:
        if RO_bar == 0:
            gamma = 1
        else:
            gamma = 0
    else:
        gamma = RO_bar / PRO_bar

    # calculate delta
    if PL_bar == 0:
        if L_bar == 0:
            delta = 1
        else:
            delta = 0
    else:
        delta = L_bar / PL_bar

    return alpha, beta, gamma, delta

alpha, beta, gamma, delta = _cafec_coeff_ufunc(ETbar, PETbar, Rbar, PRbar, Lbar, PLbar, RObar, PRObar)

File "C:homegitindices_pythonpalmer.py", line 342, in <module>
    numba.float64, numba.float64, numba.float64, numba.float64(numba.float64, numba.float64, numba.float64, numba.float64, numba.float64, numba.float64, numba.float64, numba.float64)])
  File "C:Anaconda3libsite-packagesnumbanpyufuncdecorators.py", line 120, in wrap
    vec.add(sig)
  File "C:Anaconda3libsite-packagesnumbanpyufuncdufunc.py", line 139, in add
    args, return_type = sigutils.normalize_signature(sig)
  File "C:Anaconda3libsite-packagesnumbasigutils.py", line 35, in normalize_signature
    % (sig.__class__.__name__,))
TypeError: invalid signature: 'Float' instance not allowed