Walking through directory path and opening them with trimesh

Question

I have the following code:

import os
import trimesh

# Core settings
rootdir = 'path'
extension = ".zip"


for root, dirs, files in os.walk(rootdir):
    if not root.endswith(".zip"):
        for file in files:
            if file.endswith(".stl"):
                mesh = trimesh.load(file)

And I get the following error:

ValueError: File object passed as string that is not a file!

When I open the files one by one however, it works. What could be the reason ?

Jean-François Fabre · Accepted Answer · 2017-06-10T16:20:19.573

2

that's because file is the filename, not the full filepath

Fix that by using os.path.join with the containing directory:

mesh = trimesh.load(os.path.join(root,file))

edited Jun 10 '17 at 16:20

answered Jun 10 '17 at 15:40

Jean-François Fabre

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oh I wanted to say skip if folder ends with ".zip", how I could do that? Thank you very much for the answer – Cenk_Mitir Jun 10 '17 at 15:42
Specifying the whole path and including `file_type='stl'` inside load command also worked for me. – user12628549 Oct 10 '22 at 08:52

score 2 · Answer 2 · answered Jun 10 '17 at 17:16

This is not a direct answer to your question. However, you might be interested in noting that there is now a less complicated paradigm for this situation. It involves using the pathlib module.

I don't use trimesh. I will process pdf documents instead.

First, you can identify all of the pdf files in a directory and its subdirectories recursively with just a single line.

>>> from pathlib import Path
>>> for item in path.glob('**/*.pdf'):
...     item
... 
WindowsPath('C:/Quantarctica2/Quantarctica-Get_Started.pdf')
WindowsPath('C:/Quantarctica2/Quantarctica2_GetStarted.pdf')
WindowsPath('C:/Quantarctica2/Basemap/Terrain/BEDMAP2/tc-7-375-2013.pdf')    WindowsPath('C:/Quantarctica2/Scientific/Glaciology/ALBMAP/1st_ReadMe_ALBMAP_LeBrocq_2010_EarthSystSciData.pdf')
WindowsPath('C:/Quantarctica2/Scientific/Glaciology/ASAID/Bindschadler2011TC_GroundingLines.pdf')

WindowsPath('C:/Quantarctica2/Software/CIA_WorldFactbook_Antarctica.pdf')
WindowsPath('C:/Quantarctica2/Software/CIA_WorldFactbook_SouthernOcean.pdf')
WindowsPath('C:/Quantarctica2/Software/QGIS-2.2-UserGuide-en.pdf')

You will have noticed that (a) the complete paths are made available, and (b) the paths are available within object instances. Fortunately, it's easy to recover the full paths using str.

>>> import fitz
>>> for item in path.glob('**/*.pdf'):
...     doc = fitz.Document(str(item))
...

This line shows that the final pdf document has been loaded as a fitz document, ready for subsequent processing.

>>> doc
fitz.Document('C:\Quantarctica2\Software\QGIS-2.2-UserGuide-en.pdf')

Walking through directory path and opening them with trimesh

2 Answers2