Question

I want to return a dictionary of elements by assigning each value of a list to “like” but I keep coming up with an error. This is my code.

def f([a,b,c]):
    d={a:'like'}
    for x in [a,b,c]:
        d[x]='like'
    return d

Answer 1

My guess is that this is what you want to do:

def f(my_list):
    return dict((x, "like") for x in my_list)

Example:

>>> f([1, 2, 3])
{1: 'like', 2: 'like', 3: 'like'}

In Python 2.7 or above, the function can also be written as

def f(my_list):
    return {x: "like" for x in my_list}

Regarding your original code: There is no such syntax as def f([a, b, c]). I can only guess what this is supposed to mean, there are no square brackets in a parameter list. If you want to pass in a list, use a single parameter.

In the updated version of the code the other errors were removed. The initialization of d is still strange since it would be enough to use an empty dictionary:

d = {}