What it means "TypeError: 'list' object is not callable"?
asked 2014-11-22 12:22:21 -0500
This post is a wiki. Anyone with karma >750 is welcome to improve it.
1) For example, how can I extract the divisors < 10 from the list divisors(n) ? I try to create a def with S=sum(d(i)) , d(i) verifying d(i)<10, but I get that TypeError
2) More generally, how can I do sum(d(i) with condition d(i)<10) ?
3) Where can I find a reference document for SAGE and an elementary tutorial?