python 遍历属性值问题

[梁小白]

A是一个对象，有a,b,c三个属性可以用A.a,A.b,A.c 访问，我想遍历A的这三个属值怎么写啊
for x in dir(A):
print A.x?
这个x如何替换为A的相应属性a,b,c

[梁小白]

[Quote=引用 5 楼 的回复:]

for x in dir(A):
print getattr(A, x)

实例有一大堆内建或继承而来的属性，不分门别类直接遍历处理的情况几乎没有吧，还是按4楼说的，把你关注的东西用个字典还是啥的关联一下...
[/Quote]

for x in dir(A):
print getattr(A, str(x))
这样就可以了，3KS

[bugs2k]

class AX:
    def __init__(self):
        self.x = 1
        self.y = 2.0
        self.z = 'hello'

if __name__ == '__main__':
    a = AX()
    for key in a.__dict__:
        print key, ':', a.__dict__[key]

Python 2.7.3 (default, Apr 20 2012, 22:39:59) 
[GCC 4.6.3] on linux2
Type "copyright", "credits" or "license()" for more information.
==== No Subprocess ====
>>> 
y : 2.0
x : 1
z : hello
>>> 

[Gloveing]

for x in dir(A):

print eval("A" + str(x) )

[Gloveing]

for x in dir(A):

print eval("A." + str(x) )

[panghuhu250]

虽然python可以做到你的要求，但也许这三个属性更适合放到一个dictionary里。

[angel_su]

for x in dir(A):
print getattr(A, x)

实例有一大堆内建或继承而来的属性，不分门别类直接遍历处理的情况几乎没有吧，还是按4楼说的，把你关注的东西用个字典还是啥的关联一下...

[DevinXie]

引用 1 楼 bugs2k 的回复:

class AX:
    def __init__(self):
        self.x = 1
        self.y = 2.0
        self.z = 'hello'

if __name__ == '__main__':
    a = AX()
    for key in a.__dict__:
        print key, ':', a.__dict__[key]

Python 2.7.3 (default, Apr 20 2012, 22:39:59) 
[GCC 4.6.3] on linux2
Type "copyright", "credits" or "license()" for more information.
==== No Subprocess ====
>>> 
y : 2.0
x : 1
z : hello
>>> 

这个最好。

# -*- coding:utf-8

import sys
from Tkinter import *

class attrs:
    def __init__(self,**kw):
        self.__dict__.update(kw)
    def update(self,**kw):
        self.__dict__.update(kw)

obj_attr=attrs(alerm='red',warning='yellow',normal='green')

def exitnow():
    sys.exit()

def test():
    obj_attr.update(good='green',bad='red')

    print obj_attr.normal
    print obj_attr.bad
    lst = dir(obj_attr)
    for key in obj_attr.__dict__:
        print "-----------------__dict__----------------------------"
        print key,":",obj_attr.__dict__[key]
    for each in lst:
        if each[0:2] != '__' and each != 'update':
            print "---------------------------------------------"
            print each,eval("obj_attr." + str(each))
            print "---------------------------------------------"
            print each,getattr(obj_attr,str(each))
        #print each


if __name__=='__main__':

    

    win = Tk()
    win.title("Main")
    win.geometry('300x100')
    bttn_test = Button(win,text='Test',command=test)
    bttn_test.pack(expand=YES,fill=BOTH)

    bttn_exit = Button(win,text='Exit',command=exitnow)
    bttn_exit.pack(expand=YES,fill=BOTH)

    mainloop()