[Windows] [1.0] [Bug] - NamedTemporaryFile produces a lock in windows that results in PermissionDenied when attempting to write. #38
Description
Summary
Windows apparently does locking by default apparently, which trips up the next open instruction with a "Permission Denied"
Bug Location
\jupyterscad\_render.py:50
Solution
Explicitly specify deletion, or just write out opening and writing a file without temporary file, or dive into why this does locking nonsense.
with tempfile.NamedTemporaryFile(suffix=".txt", dir=".") as tf:
with tempfile.NamedTemporaryFile(suffix=".txt", delete=False, dir=".") as tf:
Isolated Example
❌❌❌ Reproduces the failure.
import tempfile
with tempfile.NamedTemporaryFile(suffix=".txt", delete=True, dir=".") as tf:
with open(tf.name, "w") as f:
f.write("hi")✅✅✅ Solution
import tempfile
with tempfile.NamedTemporaryFile(suffix=".txt", delete=False, dir=".") as tf:
with open(tf.name, "w") as f:
f.write("hi")Original Library Error
from jupyterscad import view, render_stl
render_stl(obj, outfile="test.stl", openscad_exec=r"C:\Program Files\OpenSCAD\openscad.exe")PermissionError Traceback (most recent call last)
Cell In[31], line 3
1 from jupyterscad import view, render_stl
----> 3 render_stl(obj, outfile="test.stl", openscad_exec=r"C:\Program Files\OpenSCAD\openscad.exe")
obj = <solid.objects.difference object at 0x00000280DC31C410>
File ~\Desktop\emdr_bunny-twig\modeling\.venv\Lib\site-packages\jupyterscad\_render.py:51, in render_stl(obj=<solid.objects.difference object>, outfile='test.stl', openscad_exec=r'C:\Program Files\OpenSCAD\openscad.exe')
36 """Render a stl from an OpenSCAD object.
37
38 Typical usage example:
(...) 48 exceptions.OpenSCADException: An error occurred running OpenSCAD.
49 """
50 with tempfile.NamedTemporaryFile(suffix=".scad", dir=".") as scad_tmp_file:
---> 51 with open(scad_tmp_file.name, "w") as fp:
scad_tmp_file = <tempfile._TemporaryFileWrapper object at 0x00000280DCB23CB0>
scad_tmp_file.name = 'C:\\Users\\Zac\\Desktop\\emdr_bunny-twig\\modeling\\tmpc3czr308.scad' 52 fp.write(str(obj))
54 process(scad_tmp_file.name, outfile, executable=openscad_exec)
PermissionError: [Errno 13] Permission denied: 'C:\\Users\\Zac\\Desktop\\emdr_bunny-twig\\modeling\\tmpc3czr308.scad'