python中查看变量属性的
1、使用dir()函数查看
dir() 函数不带参数时，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。
$ python Python 2.7.8 (default, Sep 24 2015, 18:26:19) [GCC 4.9.2 20150212 (Red Hat 4.9.2-6)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import cv2 >>> mser = cv2.MSER() >>> dir(mser) ['__class__', '__delattr__', '__doc__', '__format__', '__getattribute__', '__hash__', '__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'detect', 'empty', 'getAlgorithm', 'getBool', 'getDouble', 'getInt', 'getMat', 'getMatVector', 'getParams', 'getString', 'paramHelp', 'paramType', 'setAlgorithm', 'setBool', 'setDouble', 'setInt', 'setMat', 'setMatVector', 'setString']
2、使用vars()函数查看
vars() 函数返回对象object的属性和属性值的字典对象。
>>> vars(mser) Traceback (most recent call last): File "", line 1, in TypeError: vars() argument must have __dict__ attribute >>> mser.__dict__ Traceback (most recent call last): File " ", line 1, in AttributeError: 'cv2.MSER' object has no attribute '__dict__'
更多Python知识请关注Python视频教程栏目。
