How to use the coffea.util.numpy.where function in coffea

binMins = None
        binMaxs = None
        if i == 0:
            binMins = np.unique(pars[columns[0]])
            binMaxs = np.unique(pars[columns[1]])
            if np.all(binMins[1:] == binMaxs[:-1]):
                bins[layout[i + offset_name]] = np.union1d(binMins, binMaxs)
            else:
                warnings.warn('binning for file for %s is malformed in variable %s' % (name, layout[i + offset_name]))
                bins[layout[i + offset_name]] = np.union1d(binMins, binMaxs[-1:])
        else:
            counts = np.zeros(0, dtype=np.int)
            allBins = np.zeros(0, dtype=np.double)
            for binMin in bins[bin_order[0]][:-1]:
                binMins = np.unique(pars[np.where(pars[columns[0]] == binMin)][columns[i + offset_col]])
                binMaxs = np.unique(pars[np.where(pars[columns[0]] == binMin)][columns[i + offset_col + 1]])
                theBins = None
                if np.all(binMins[1:] == binMaxs[:-1]):
                    theBins = np.union1d(binMins, binMaxs)
                else:
                    warnings.warn('binning for file for %s is malformed in variable %s' % (name, layout[i + offset_name]))
                    theBins = np.union1d(binMins, binMaxs[-1:])
                allBins = np.append(allBins, theBins)
                counts = np.append(counts, theBins.size)
            bins[layout[i + offset_name]] = awkward.JaggedArray.fromcounts(counts, allBins)
        bin_order.append(layout[i + offset_name])
        offset_col += 1

    # skip nvars to the variable columns
    # the columns here define clamps for the variables defined in columns[]
    # ----> clamps can be different from bins
    # ----> if there is more than one binning variable this array is jagged

def masked_bin_eval(dim1_indices, dimN_bins, dimN_vals):
    dimN_indices = np.empty_like(dim1_indices)
    for i in np.unique(dim1_indices):
        idx = np.where(dim1_indices == i)
        dimN_indices[idx] = np.clip(np.searchsorted(dimN_bins[i],
                                                    dimN_vals[idx],
                                                    side='right') - 1,
                                    0, len(dimN_bins[i]) - 2)
    return dimN_indices

def masked_bin_eval(dim1_indices, dimN_bins, dimN_vals):
    dimN_indices = np.empty_like(dim1_indices)
    for i in np.unique(dim1_indices):
        idx = np.where(dim1_indices == i)
        dimN_indices[idx] = np.clip(np.searchsorted(dimN_bins[i],
                                                    dimN_vals[idx],
                                                    side='right') - 1,
                                    0, len(dimN_bins[i]) - 2)
    return dimN_indices

def masked_bin_eval(dim1_indices, dimN_bins, dimN_vals):
    dimN_indices = np.empty_like(dim1_indices)
    for i in np.unique(dim1_indices):
        idx = np.where(dim1_indices == i)
        dimN_indices[idx] = np.clip(np.searchsorted(dimN_bins[i],
                                                    dimN_vals[idx],
                                                    side='right') - 1,
                                    0, len(dimN_bins[i]) - 2)
    return dimN_indices

for i in range(nBinnedVars):
        binMins = None
        binMaxs = None
        if i == 0:
            binMins = np.unique(pars[columns[0]])
            binMaxs = np.unique(pars[columns[1]])
            if np.all(binMins[1:] == binMaxs[:-1]):
                bins[layout[i + offset_name]] = np.union1d(binMins, binMaxs)
            else:
                warnings.warn('binning for file for %s is malformed in variable %s' % (name, layout[i + offset_name]))
                bins[layout[i + offset_name]] = np.union1d(binMins, binMaxs[-1:])
        else:
            counts = np.zeros(0, dtype=np.int)
            allBins = np.zeros(0, dtype=np.double)
            for binMin in bins[bin_order[0]][:-1]:
                binMins = np.unique(pars[np.where(pars[columns[0]] == binMin)][columns[i + offset_col]])
                binMaxs = np.unique(pars[np.where(pars[columns[0]] == binMin)][columns[i + offset_col + 1]])
                theBins = None
                if np.all(binMins[1:] == binMaxs[:-1]):
                    theBins = np.union1d(binMins, binMaxs)
                else:
                    warnings.warn('binning for file for %s is malformed in variable %s' % (name, layout[i + offset_name]))
                    theBins = np.union1d(binMins, binMaxs[-1:])
                allBins = np.append(allBins, theBins)
                counts = np.append(counts, theBins.size)
            bins[layout[i + offset_name]] = awkward.JaggedArray.fromcounts(counts, allBins)
        bin_order.append(layout[i + offset_name])
        offset_col += 1

    # skip nvars to the variable columns
    # the columns here define clamps for the variables defined in columns[]
    # ----> clamps can be different from bins

dtype=None,
                                names=tuple(columns),
                                converters={1: lambda s: s.strip(),
                                            2: lambda s: s.strip(),
                                            10: lambda s: s.strip(' "')},
                                delimiter=',',
                                skip_header=1,
                                unpack=True,
                                encoding='ascii'
                                )

    all_names = corrections[[columns[i] for i in range(4)]]
    labels = np.unique(corrections[[columns[i] for i in range(4)]])
    wrapped_up = {}
    for label in labels:
        etaMins = np.unique(corrections[np.where(all_names == label)][columns[4]])
        etaMaxs = np.unique(corrections[np.where(all_names == label)][columns[5]])
        etaBins = np.union1d(etaMins, etaMaxs).astype(np.double)
        ptMins = np.unique(corrections[np.where(all_names == label)][columns[6]])
        ptMaxs = np.unique(corrections[np.where(all_names == label)][columns[7]])
        ptBins = np.union1d(ptMins, ptMaxs).astype(np.double)
        discrMins = np.unique(corrections[np.where(all_names == label)][columns[8]])
        discrMaxs = np.unique(corrections[np.where(all_names == label)][columns[9]])
        discrBins = np.union1d(discrMins, discrMaxs).astype(np.double)
        vals = np.zeros(shape=(len(discrBins) - 1, len(ptBins) - 1, len(etaBins) - 1),
                        dtype=corrections.dtype[10])
        for i, eta_bin in enumerate(etaBins[:-1]):
            for j, pt_bin in enumerate(ptBins[:-1]):
                for k, discr_bin in enumerate(discrBins[:-1]):
                    this_bin = np.where((all_names == label) &
                                        (corrections[columns[4]] == eta_bin) &
                                        (corrections[columns[6]] == pt_bin) &