Can you explain this Python3 syntax ?

Question

Hello SoloLearn,
can you explain this code in details ?

https://code.sololearn.com/chyf6a3UO2A9/?ref=app

Have a nice day !

Answer 1

n=1000
k=67

print(*n//k*[k]+[n%k]*(n%k>0))

n%k=62
n//k=14

so last line can be simplified to
print(*14*[67]+[62]*(62>0))
which is actually 2 parts,
* 14*[67] + [62]*(62>0)
because 62 IS BIGGER THAN 0, 62>0 is True
True is represented in python (as an integer) using 1
True==1
False==0
so [62]*(62>0) can be simplified as
[62]*(1)
=[62]

so now first statrment becomes
* 14*[67] + [62]
[67]*14 is [67,67,67,67,67,67,67,67,67,67,67,67,67,67]

so statement is now
* [67,67,67,67,67,67,67,67,67,67,67,67,67,67]+[62]
= * [67,67,67,67,67,67,67,67,67,67,67,67,67,67,62]

*mark is here is taken as unpacking operator
so it unpacks list and gives individual items
eg:
*[1,2,4] = 1,2,4
*[6,0,7]= 6,0,7

so statement is now
print(67,67,67,67,67,67,67,67,67,67,67,67,67,67,62)
so it prints the answer.

Answer 2

look on operator precedent in python to understand why this happened in exactly this order

Answer 3

@Sunera Avinash, very well, I thank you alot for your time.
By the way, it was on CodinGame multiplayer, I've lost against a Python3 player and I always need to understand when my 15 lines code is beated in a single line
Powerfull tool 🙂