1: On rare cases i use print (testing new stuff), in most case i'd rather have a logger (or the poor man solution : `if $DEBUG == 3: print X`, but a logger is better): it allows me to keep my debugging structure to understand failure (especially when i get the input from a source i don't manage)

2: I wish, but most of the time i can't run in on my company laptop, so no.

3: Yes, pdb/gdb every time

4: With lisp (but really, it's like a step-by-step debugger, so no?)