一键查看对象所有方法

# 不带参数时返回当前范围内的变量、方法和定义的类型列表；带参数时返回参数的属性，方法列表。

>>> class Student():
      def __init__(self,id,name):
        self.id = id
        self.name = name

>>> xiaoming = Student('001','xiaoming')
>>> dir(xiaoming)
['__call__', '__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'id', 'name']