[DF] Display should list all elements of a collection by default, like TTree::Scan #6981
Description
Explain what you would like to see improved
From Andrea Rizzi: currently df.Display() only shows the first and last elements of collection columns. It would be more helpful/intuitive if all elements were listed, at least up to a reasonable collection length.
Example of the current output:
y | x | w | z |
100 | 1 | 1.8000000 | { 1.1000000, 2.1000000 } |
| ... | | ... |
| 4 | | { 3.1000000, 4.1000000 } |
10000 | 5 | 3.2400000 | { 4.5100000, 5.5100000 } |
| ... | | ... |
| 8 | | { 6.5100000, 7.5100000 } |
1000000 | 9 | 5.8320000 | { 8.2610000, 9.2610000 } |
| ... | | ... |
| 12 | | { 10.261000, 11.261000 } |
100000000 | 13 | 10.497600 | { 12.387100, 13.387100 } |
| ... | | ... |
| 16 | | { 14.387100, 15.387100 } |
10000000000 | 17 | 18.895680 | { 16.925810, 17.925810 } |
| ... | | ... |
| 20 | | { 18.925810, 19.925810 } |
To Reproduce
$ python $(root-config --tutdir)/dataframe/df024_Display.py