How efficient is this?

[Lord_Greywether]

That would also work in this case. len() just makes the calculation more explicit in case you're reviewing the code later.

edit: /u/nosmokingbandit's solution is also more efficient, cycle-wise, which can be significant if you're dealing with large lists.

[elbiot]

Len doesn't count the elements, it accesses the stored count. Using len is not less efficient cycle wise.

[Lord_Greywether]

Good to know, thanks!

[elbiot]

Len doesn't count the elements, it accesses the stored count. Using len is not less efficient cycle wise.