Testing the data type of a value

Alan Bawden alan at csail.mit.edu
Mon May 13 10:33:28 EDT 2019


Luuk <luuk.vosslamber at gmail.com> writes:
...
> Maybe i should have asked this:
> 
> What is the difference between 'type(5)==int'  and 'isinstance(5,int)'
> 
> and, if there is no difference why did someone invent 'isinstance()' ...

Look:

  Python 3.6.6 (default, Aug 13 2018, 18:24:23)
  [GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  >>> isinstance(True, int)
  True
  >>> type(True) == int
  False
  >>> type(True)       
  <class 'bool'>

-- 
Alan Bawden


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