在python中循环一个类的​​所有成员变量 [英] looping over all member variables of a class in python

问题描述

如何获取可迭代类中所有变量的列表?有点像 locals()，但对于一个类

class 示例(对象):bool143 = 真bool2 = 真废话=假foo = 真foob​​ar2000 = 假def as_list(self)ret = []对于 XXX 中的字段:如果 getattr(self, field):ret.append(字段)返回 ",".join(ret)

这应该返回

<预><代码>>>>e = 示例()>>>e.as_list()bool143, bool2, foo

解决方案

dir(obj)

为您提供对象的所有属性.您需要自己从方法等中过滤掉成员:

class 示例(对象):bool143 = 真bool2 = 真废话=假foo = 真foob​​ar2000 = 假示例 = 示例()members = [attr for attr in dir(example) if not callable(getattr(example, attr)) 而不是 attr.startswith("__")]印刷会员

会给你:

['blah', 'bool143', 'bool2', 'foo', 'foobar2000']

How do you get a list of all variables in a class thats iteratable? Kind of like locals(), but for a class

class Example(object):
    bool143 = True
    bool2 = True
    blah = False
    foo = True
    foobar2000 = False

    def as_list(self)
       ret = []
       for field in XXX:
           if getattr(self, field):
               ret.append(field)
       return ",".join(ret)

this should return

>>> e = Example()
>>> e.as_list()
bool143, bool2, foo

解决方案

dir(obj)

gives you all attributes of the object. You need to filter out the members from methods etc yourself:

class Example(object):
    bool143 = True
    bool2 = True
    blah = False
    foo = True
    foobar2000 = False

example = Example()
members = [attr for attr in dir(example) if not callable(getattr(example, attr)) and not attr.startswith("__")]
print members   

Will give you:

['blah', 'bool143', 'bool2', 'foo', 'foobar2000']

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