[Tutor] "if clause" in list comprehensions.

Eduardo Vieira eduardo.susan at gmail.com
Mon Oct 19 18:39:51 CEST 2009

The other day I was making a script and decided to use a list
compreehension and I found out that this code:
mylist = ['John', 'Canada', 25, 32, 'right']
a = [item.upper() for item in mylist if type(item) == type('good')]
returned this: ['JOHN', 'CANADA', 'RIGHT']
I was expecting this: ['JOHN', 'CANADA', 25, 32, 'RIGHT']
So, actually the "if" acted like a filter.
In order to use a list comprehension I created this function instead.
def upperfy(item)
        item = item.upper()
    except AttributeError:
    return item

a = [upperfy(item) for item in mylist]

My question is? Am I solving the problem in the right way? Am I
missing something?
Thanks for all the help I've been getting as a newcomer.


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