Repeat item with Python

Revit
,
1

Hello I would like to achieve this node of dynamo in python

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I got a flatten list with another list with number of times to repeat each index of the flatten list, so the result is sublists with repeated items, for example:
image

thanks

1 Like
3 
x = IN[0]

n = 3

OUT = [item for item in x for i in range(n)]

that i tried from “stackflow” page

2022-04-25_18h42_02
2022-04-25_18h42_021138Ă—541 81.7 KB

4

it does not work because asking a number in the range and I put a list of numbers
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5

@ruben.romero can you show your list structure?

6

image

7

Like this?

image
image753Ă—506 23.1 KB

OUT = [[itm]*n for itm,n in zip(IN[0],IN[1])]

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8

A slight alteration to @EdsonMatt appraoch:

import sys

i = "item"
a = [1,5,1,4]

OUT = [[itm]*n for itm,n in zip([i] * len(a),a)]

image

3 Likes
9

Generally you’ll need to iterate (for x in listobject) if you wan’t to run any example people show you on Dynamo forums across a list object. If you’re working across lists in parallel, the zip() option is handy.

Some fairly well comprehended versions above, but this is the expanded version. I generally find these easier to read versus comprehended (essentially implied) statements ([x for x in thing]).

rptList = IN[0]
numList = IN[1]

outList = []

for rpt,num in zip(rptList,numList):
	out = []
	for n in range(num):
		out.append(rpt)
	outList.append(out)
	
OUT = outList

rpt
rpt1242Ă—671 61.1 KB

5 Likes
10

Man thanks @GavinCrump, tested and working well. Athough finally I used the @EdsonMatt single line code.

1 Like