[Tutor] Problems using .lower()

[Steven D'Aprano]

Hi Jonathan, and welcome!

It is difficult to advise you when we don't know what you are doing 
wrong. You should always show us your code: the *minimum* amount of code 
that demonstrates the nature of your problem. Otherwise we're just 
guessing.

More below:

On Fri, Sep 23, 2016 at 12:19:04PM -0600, Jonathan Curtis wrote:
> Hi,
> 
> I am trying to complete an assignment for school and having problems
> getting it to work.  I have lists named l_one and and l_two they both have
> a combination of integers and strings.  I am supposed to combined the lists
> into a l_three and have no duplicate numbers and strings.  Both lists have
> the number 2 and l_one has cat while l_two has Cat.  I am having a problem
> being able to get Cat to cat so that it recognizes the duplicate.  Pleas
> advise me in this problem.  Let me know how you would do it so that I can
> compare it to what I have been trying to do.  Thanks for your time and help.


I'll try to guess that you're doing something like this:


# Wrong way, doesn't work.
a = 'cat'
b = 'Cat'
b.lower()  # lowercase of b
a == b
# returns False, they are not equal



# Instead, try this:
a = 'cat'
b = 'Cat'
b = b.lower()  # set b to the lowercase of b
a == b
# returns True


# Or even better:
a = 'cat'
b = 'Cat'
a.lower() == b.lower()
# returns True


-- 
Steve