Python: multi dimensional array to data tree

I am having trouble converting multi dimensional python lists to a data tree

the following works

def PyListToDataTree(PyList):

result = DataTree[object]()

for i in range(len(PyList)):

temp = []

for j in range(len(PyList[i])):

temp.append(PyList[i][j])

path = GH_Path(i)

result.AddRange(temp, path)

return result

but how would one modify this so it can handle 3D and 4D lists

Replies to This Discussion

Permalink Reply by David Rutten on July 30, 2014 at 6:14am

You're going to have to make more complicated paths. Instead of GH_Path(i), you'll have to append each list using a path like GH_Path(i,j,k)

David Rutten

david@mcneel.com

Permalink Reply by Vincent Huyghe on July 30, 2014 at 6:47am

Thx for the quick reply David

I understand I will need to specify path = GH_path(i,j,k) for a 3D array. However i am not clear on how i should iterate through the python lists and add the path's. Ive tried the following but the output is incorrect

def PyListToDataTree(PyList):

result = DataTree[object]()

for i in range(len(PyList)):

for j in range(len(PyList[i])):

temp = []

for k in range(len(PyList[i][j])):

temp.append(PyList[i][j][k])

path = GH_Path(i,j,k)

result.AddRange(temp, path)

return result

Permalink Reply by David Rutten on July 30, 2014 at 7:04am

Looks correct to me -at least in principle-. Python isn't my strong suit though so I shan't comment too much.

How is the output incorrect?

David Rutten

david@mcneel.com

Permalink Reply by Mostapha Sadeghipour Roudsari on July 30, 2014 at 7:17am

Try this one:

def PyListToDataTree(PyList):

result = DataTree[object]()

  for i, listsOfLists in enumerate(PyList):

  for j , otherList in enumerate(listsOfLists):

  for k, finalList in enumerate(otherList):

           path = GH_Path(i,j,k)

           result.AddRange(finalList, path)

  return result