utils.py 文件源码

def parse_factor_expression(call_or_name_node):
    if isinstance(call_or_name_node, ast.Name):  # a.set_to(b) is shorthand for a.set_to(Copy(b))
        name_node = call_or_name_node
        return None, [name_node.id]

    elif isinstance(call_or_name_node, ast.Call):  # a.set_to(f(b))
        call_node = call_or_name_node
        return call_node.func.id,  [name_or_number(node) for node in call_node.args]

    elif isinstance(call_or_name_node, ast.Num):  # a.observe_value(0)
        num_node = call_or_name_node
        return None, [int(num_node.n)]

    elif isinstance(call_or_name_node, ast.Subscript):
        print ast.dump(call_or_name_node)
        pdb.set_trace()

    else:
        assert False, "Can't parse factor " + ast.dump(call_or_name_node)