What is the ellipsis [...] in a Python list? -


i playing around in python. used following code in idle

p  = [1, 2] p[1:1] = [p] print p

the output 

[1, [...], 2]

what […]? interestingly use list of list of list upto infinity i.e.

p[1][1][1]....

i write above long wanted , still work.

edit:

  • how represented in memory?
  • what's use? examples of cases useful helpful.
  • any link official documentation useful.

it means created infinite list nested inside itself, can not printed. p contains p contains p ... , on. [...] notation way let know this, , inform can't represented! take @ @6502's answer see nice picture showing what's happening.

now, regarding 3 new items after edit:

  • this answer seems cover it
  • ignacio's link describes possible uses
  • this more topic of data structure design programming languages, it's unlikely reference found in python's official documentation

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