前言
最近工作中遇到个需求是要得到一个类的静态属性,也就是说有个类 Type ,我要动态获取 Type.FTE
这个属性的值。
最简单的方案有两个:
getattr(Type,'FTE') Type.__dict__['FTE']
那么,如果要获取类属性的列表,该怎么做呢?
首先上场的是 dir ,它能返回当前范围的所有属性名称列表:
>>> dir() ['__builtins__','__doc__','__name__','__package__'] >>> dir(list) ['__add__','__class__','__contains__','__delattr__','__delitem__','__delslice__','__eq__','__format__','__ge__','__getattribute__','__getitem__','__getslice__','__gt__','__hash__','__iadd__','__imul__','__init__','__iter__','__le__','__len__','__lt__','__mul__','__ne__','__new__','__reduce__','__reduce_ex__','__repr__','__reversed__','__rmul__','__setattr__','__setitem__','__setslice__','__sizeof__','__str__','__subclasshook__','append','count','extend','index','insert','pop','remove','reverse','sort']
可以配合使用 inspect 包中的功能来过滤:
>>> [i for i in dir(list) if inspect.isbuiltin(getattr(list,i))] ['__new__','__subclasshook__']
inspect 包中还包含:
>>> [i for i in dir(inspect) if inspect.isfunction(getattr(inspect,i))] ['_searchbases','classify_class_attrs','cleandoc','findsource','formatargspec','formatargvalues','getabsfile','getargs','getargspec','getargvalues','getblock','getcallargs','getclasstree','getcomments','getdoc','getfile','getframeinfo','getinnerframes','getlineno','getmembers','getmodule','getmoduleinfo','getmodulename','getmro','getouterframes','getsource','getsourcefile','getsourcelines','indentsize','isabstract','isbuiltin','isclass','iscode','isdatadescriptor','isframe','isfunction','isgenerator','isgeneratorfunction','isgetsetdescriptor','ismemberdescriptor','ismethod','ismethoddescriptor','ismodule','isroutine','istraceback','joinseq','namedtuple','stack','strseq','trace','walktree']
还可以配合 callable 来使用:
>>> [i for i in dir(inspect) if not callable(getattr(inspect,i))] ['CO_GENERATOR','CO_NESTED','CO_NEWLOCALS','CO_NOFREE','CO_OPTIMIZED','CO_VARARGS','CO_VARKEYWORDS','TPFLAGS_IS_ABSTRACT','__author__','__builtins__','__date__','__file__','__package__','_filesbymodname','dis','imp','linecache','modulesbyfile','os','re','string','sys','tokenize','types']
上面提到了 __dict__ ,也可以用它来获取属性列表:
>>> list.__dict__.keys() ['__getslice__','sort','__add__','__ge__']
总结
以上就是在Python中得到类属性列表的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流。
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