human
Solve the following python programming problem given the following code:
def _get_idx_expr_recurse(exprnode, indexedcols, idxexprs, strexpr) : 
    "Here lives the actual implementation of the get_idx_expr() wrapper.

    'idxexprs' is a list of expressions in the form ``(var, (ops),
    (limits))``. 'strexpr' is the indexable expression in string format.
    These parameters will be received empty (i.e. [], ['']) for the
    first time and populated during the different recursive calls.
    Finally, they are returned in the last level to the original
    wrapper.  If 'exprnode' is not indexable, it will return the tuple
    ([], ['']) so as to signal this.

    " 
    not_indexable = ([], ['']) 
    op_conv = { 
        'and' : '&', 
        'or' : '|', 
        'not' : '~', 
} 
    negcmp = { 
        'lt' : 'ge', 
        'le' : 'gt', 
        'ge' : 'lt', 
        'gt' : 'le', 
} 
    def fix_invert(idxcmp, exprnode, indexedcols) : 
        invert = False 
        while (idxcmp [1] == 'invert') : 
            invert ^= True 
            exprnode = idxcmp [0] 
            idxcmp = _get_indexable_cmp (exprnode, indexedcols) 
return (idxcmp, exprnode, invert) 
idxcmp = _get_indexable_cmp (exprnode, rcolvar) 
    (idxcmp, exprnode, invert) = fix_invert (idxcmp, exprnode, indexedcols) 
    if idxcmp [0] : 
        if invert : 
            (var, op, value) = idxcmp 
            if ((op == 'eq') and (value in [True, False])) : 
                value ^= True 
else : 
                op = negcmp [op] 
expr = (var, (op,), (value,)) 
            invert = False 
else : 
            expr = (idxcmp [0], (idxcmp [1],), (idxcmp [2],)) 
return [expr] 
if invert : 
        return not_indexable 
if ((exprnode.astType != 'op') or (exprnode.value not in ['and', 'or'])) : 
        return not_indexable 
(left, right) = exprnode.children 
    (lcolvar, lop, llim) = _get_indexable_cmp (left, indexedcols) 
    (rcolvar, rop, rlim) = _get_indexable_cmp (right, indexedcols) 
    op = exprnode.value 
    if ((lcolvar is not None) and (rcolvar is not None) and _equiv_expr_node (lcolvar, rcolvar) and (op...

    
    

    Fix the buggy line: idxcmp = _get_indexable_cmp (exprnode, rcolvar)
assistant
#Here is Python program to fix the buggy line: idxcmp = _get_indexable_cmp (exprnode, rcolvar)
.

idxcmp = _get_indexable_cmp (exprnode, indexedcols)