Create custom list to label things (B.01.01, B.01.02 ... B.02.01, B.02.02 etc)

Grasshopper Developer
1

Hey Folks, I’ve been finding solutions on these forums for my Grasshopper questions for quite a while now, but I seem to be stuck now, so I will post my first thread ever (aka, a long time)

I want to generate a list of 160 numbers to label sections I am generating in Grasshopper.
The list has to be as follows:
B.01.01
B.01.02
B.01.03
B.01.04
B.01.05
B.02.01
B.02.02
…
B.02.05
B.03.01

untill we get at B.32.05, which will be the 160th and last entry of the list.
So it will always start with B., followed by first coordinate, (1-32), followed by a second coordinate (1-5)
This will be the input for a tag-component

I feel like there should be a simple way to make lists like this, but have not been able to find it. Could you help me out?

3

Hello,

This is quite easy to do with a Python component. Here is one way:

a = list()                       # default output name, set up as a list
for num1 in range(1,33):         # 1 included, 33 excluded
  num1 = str(num1).zfill(2)      # convert to string, add leading zero

  for num2 in range(1,6):
    num2 = str(num2).zfill(2)

    label = 'B.'+num1+'.'+num2
    a.append(label)              # add label to the end of the list
4

image
image.png738×308 26.9 KB

Format List.gh (7.6 KB)

edit

you actually don’t need the long list component

image

5

you don’t need the repeat data component, grafting the input is enough.

Canvas%20at%2014%3B12%3B25
Canvas%20at%2014%3B12%3B251644×608 30.1 KB

1 Like
6

Or as a python 1-liner, for the fun:

a = ["B.{:02d}.{:02d}".format(a,b) for a in range(1,33) for b in range(1,6)]
2 Likes
7

Thank you for the help guys, I’m completely unfamiliar with Python, so I think I will opt for the Format-component, which I did not know untill now.