CODEWITHSUNDEEP
pythonpython-2.7
Deepend
Deepend

Reputation: 4155

Best way to find out the object type of each item in a list

What is the best way to find out the object type of each item in a list?

I have been using the below but it is very cumbersome and requires that one knows of the object type in order to be able to test for it. 

for form in form_list:

    if type(form) is list:
        print 'it is a list'
    else:
        print 'it is not a list'

    if type(form) is dict:
        print 'it is a dict'
    else:
        print 'it is not a dict'              

    if type(form) is tuple:
        print 'it is a tuple'
    else:
        print 'it is not a tuple' 

    if type(form) is str:
        print 'it is a string'
    else:
        print 'it is not a string'             

    if type(form) is int:
        print 'it is an int'
    else:
        print 'it is not an int'

Upvotes: 1

Views: 414

Answers (2)

pzp
pzp

Reputation: 6617

In Python 2.7:

form_list = ['blah', 12, [], {}, 'yeah!']
print map(type, form_list)

[str, int, list, dict, str]

In Python 3.4:

form_list = ['blah', 12, [], {}, 'yeah!']
print(list(map(type, form_list)))

[<class 'str'>, <class 'int'>, <class 'list'>, <class 'dict'>, <class 'str'>]

Upvotes: 3

Berserker
Berserker

Reputation: 1112

Knowing type in python is oftentimes not the desired way to go. Read up on the topic duck-typing if you're new to this.

If you still want to go down this path, do:

objtype = type(form)
if objtype is list:
    #do stuff
elif objtype is str:
    #do other stuff
else:
    #can't handle this

and so on

Upvotes: 1

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