def METHOD_NAME(exprs):
    """
    Get a graph representing the variable dependencies
    Args:
        exprs: a mapping of variable name to expression
    Returns:
        a graph of variable deps
    """
    vars = list(exprs.keys())
    # Get dependencies for each expression, load into graph
    var_graph = _graph()
    for var in vars:
        var_graph.add_node(var)
    for var, expr in exprs.items():
        for dep in get_variable_dependencies(expr, vars):
            if dep != var:
                var_graph.add_edge(dep, var)
    return var_graph