CODEWITHSUNDEEP
python
abcazx
abcazx

Reputation: 125

how to reveal an object's attributes in Python?

Is there any method to let me know the values of an object's attributes? For example,
info = urllib2.urlopen('http://www.python.org/')
I wanna know all the attributes' values of info. Maybe I don't know what are the attributes the info has. And str() or list() can not give me the answer.

Upvotes: 0

Views: 463

Answers (5)

user2665694
user2665694

Reputation:

All methods using dir() or looking at dict are bascially a no go.

Better check

obj.__class__

and 

obj.__class__.__bases__

in order to get an idea what the object really is.

Then you should check the offial API documentation of the module.

Methods and data might be private and are in general not for public consumption unless stated otherwise by the documentation.

Upvotes: 0

user1632861
user1632861

Reputation:

To get all the names of object's attributes, use dir(obj). To get their values, use getattr(obj, attr_name). You could print all the attributes and their values like so:

for attr in dir(obj):
    print(attr, getattr(obj, attr))

If you don't need the built-in attributes, such as __str__ etc, you can simply use obj.__dict__, which returns a dictionary of object's attributes and their values.

for k in obj.__dict__:
    print(k, obj.__dict__[k])

Upvotes: 3

siddharthlatest
siddharthlatest

Reputation: 2257

You can use vars(info) or info.__dict__. It will return the object's namespace as a dictionary in the attribute_name:value format.

Upvotes: 2

Sudip Kafle
Sudip Kafle

Reputation: 4391

You can use Python's dir(). dir(info) will return all the valid attributes for the object info.

info = urllib2.urlopen('http://www.python.org/')
print dir(info)

Upvotes: 2

manojlds
manojlds

Reputation: 301117

You can just use dir():

dir(info)

dir() man:

With an argument, attempt to return a list of valid attributes for that object.

Upvotes: 1

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