How to fill in a dictionary with key and value from a string?

[bartc]

On 30/03/2018 21:13, C W wrote:
> Hello all,
> 
> I want to create a dictionary.
> 
> The keys are 26 lowercase letters. The values are 26 uppercase letters.
> 
> The output should look like:
> {'a': 'A', 'b': 'B',...,'z':'Z' }

> I know I can use string.ascii_lowercase and string.ascii_uppercase, but how
> do I use it exactly?
> I have tried the following to create the keys:
> myDict = {}
>          for e in string.ascii_lowercase:
>              myDict[e]=0

If the input string S is "cat" and the desired output is {'c':'C', 
'a':'A', 't':'T'}, then the loop might look like this:

    D = {}
    for c in S:
        D[c] = c.upper()

    print (D)

Output:

{'c': 'C', 'a': 'A', 't': 'T'}

> But, how to fill in the values? Can I do myDict[0]='A', myDict[1]='B', and
> so on?

Yes, but the result will be {0:'A', 1:'B',...} for which you don't need 
a dict; a list will do.

-- 
bartc