Python question about dictionary

Question

Just played a confusing Python code on SoloLearn:

arr = ['b', 'c', 'd']
x = {1:'a'}
n = 1
for x[n] in arr:
n+= 1
print (x)

Answer is {1: 'b', 2: 'c', 3: 'd'}

I don't understand how the dictionary x get modified in this process, anyone could enlighten me?

Answer 1

if u had
for i in array:
...
you would assign each element of array to i.

now here we have x[n] instead of i
and n = 1.

in the first loop you assign first element ( not to i but )
to x[1].
in the next loop the 2nd element to x[2]...

Answer 2

Oma Falk Thank you for the explanation. I totally understand now, it’s such a beautiful way to creat dictionary!

Answer 3

WhyFry check Oma’s explaination, in each of for loop, there was actullay a “x[n] =...” happened.

Answer 4

Xiang Song Thanks for asking this I was curios too!!

Answer 5

Aditya Singh Chauhan
yep....ine of my favorite posts the last weeks