List comprehension (a sort of an intro)

Hello World!

We have a list like

>>> people = ["John","Jack","Jim"]

Let's say we want to add a number next to each one of this name.

we could use this way


------------------------------- code ------------------------

people = ["John","Jack","Jim"]

x = 0

for names in people:

    people[people.index(names)] = people[people.index(names)] + " " + str(x)

    x += 1

print(people)


-------------------------------------------------------------

otuput: ['John 0', 'Jack 1', 'Jim 2']

--------------------------------------------------------------

Let's explain it a little bit.

with

for names in people:

we iterate the list "people", right?

We go through "John","Jack" and "Jim"...

to add the number ...we used this system: to find the index of each name in people and then use this

index to change the value adding the 'x' variable (transformed in string with str(x), because you can't add

a number to a string)

Is there another way?
Yes... but we will talk about this in the next blog.