[Python] Help with isinstance() on a custom type

[blazemore]

I am using BeautifulSoup and have BeautifulSoup.py in the same folder as my program.

Running type() on a specific object I want to check against gives me this output:

<class 'BeautifulSoup.NavigableString'>

How can I use isinstance on any other item to see if it is of this type?

using isinstance(item, <class 'BeautifulSoup.NavigableString'>) doesn't work.

[MadCow108]

isinstance(obj, BeautifulSoup.NavigableString)

or

a = BeautifulSoup.NavigableString(...)
isinstance(obj, type(a)

[blazemore]

isinstance(obj, BeautifulSoup.NavigableString)

or

a = BeautifulSoup.NavigableString(...)
isinstance(obj, type(a)

The first one gives me something like BeautifulSoup has no attribute NavigableString.
I'll try the second one in a minut.e
Thanks.