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maelzel's Issues

Attribute errors on running Maelzel Tutorials -> missing attribute in maelzel\_util.py?

Hello, I am new to Maelzel and am trying to begin with the tutorials. Right from the start in I'm getting the following Exception:

Traceback (most recent call last):
    seq.show()
  File "...\maelzel\core\mobj.py", line 683, in show
    img = self._renderImage(backend=backend, fmt=fmt, scorestruct=scorestruct,
  File "...\maelzel\core\mobj.py", line 864, in _renderImage
    _renderImage(obj=self, outfile=outfile, backend=backend,
  File "...\maelzel\core\mobj.py", line 1772, in _renderImage
    tmpfile, renderer = _renderImageCached(obj=obj, fmt=fmt, config=config, backend=backend,
  File "...\maelzel\core\mobj.py", line 1798, in _renderImageCached
    renderer.write(outfile)
  File "...\maelzel\scoring\renderlily.py", line 1161, in write
    _util.imagefileAutocrop(tempout, cropfile, bgcolor="#ffffff")
AttributeError: module 'maelzel._util' has no attribute 'imagefileAutocrop'

It appears to happen when rendering the lilypond file, and I also get the following Error messages from lilypond:

[maelzel:lilytools.py:367:renderLily:ERROR] Error while running lilypond, failed to produce a png file: ...\AppData\Local\tmpk9ja2k6b\l6p69pgj.png
[maelzel:lilytools.py:368:renderLily:ERROR] Return code: 1
[maelzel:lilytools.py:369:renderLily:ERROR] Outfile: '...\AppData\Local\tmpk9ja2k6b\l6p69pgj.png', exists: False
[maelzel:lilytools.py:370:renderLily:ERROR] stdout: 

[maelzel:lilytools.py:371:renderLily:ERROR] stderr: 
!! 'C:\Program' is not recognized as an internal or external command,
!! operable program or batch file.

Could the _util.py file in the current version be older?

FileNotFoundError during the imageAutocrop functionality

When Maelzel attempts to render the lilypond file, it runs into the following Exception:

Traceback (most recent call last):
  File "...\testing.py", line 24, in <module>
    seq.show()
  File "...\maelzel\core\mobj.py", line 683, in show
    img = self._renderImage(backend=backend, fmt=fmt, scorestruct=scorestruct,
  File "...l\maelzel\core\mobj.py", line 864, in _renderImage
    _renderImage(obj=self, outfile=outfile, backend=backend,
  File "...\maelzel\core\mobj.py", line 1772, in _renderImage
    tmpfile, renderer = _renderImageCached(obj=obj, fmt=fmt, config=config, backend=backend,
  File "...\maelzel\core\mobj.py", line 1798, in _renderImageCached
    renderer.write(outfile)
  File "...\maelzel\scoring\renderlily.py", line 1162, in write
    _imgtools.imagefileAutocrop(tempout, cropfile, bgcolor="#ffffff")
  File "...\maelzel\_imgtools.py", line 45, in imagefileAutocrop
    imgobj = imageAutocrop(imgfile, bgcolor=bgcolor)
  File "...\maelzel\_imgtools.py", line 20, in imageAutocrop
    imgobj = img if isinstance(img, Image.Image) else Image.open(img)
  File "...\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\PIL\Image.py", line 3431, in open
    fp = builtins.open(filename, "rb")
FileNotFoundError: [Errno 2] No such file or directory: '...\\AppData\\Local\\Packages\\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\\LocalCache\\Local\\tmphgk9m3a_\\ckbcgml5.png'

Fiddling around, I found the filepath sent to PIL.Image is \AppData\Local\tmphgk9m3a_\ckbcgml5.png, which is different from the one called in builtins.open, so its likely changed in the os.path.realpath segment of the `PIL.Image`` file.
I am not familiar enough with how maelzel creates and works with the temp files, or how PIL works to sort this out myself, do you have any recommendations?

Mac .show ?

Hi Eduardo,

Just trying to test maelzel and in the first exemple got stuck with this:

from maelzel.core import *

seq = Chain([
    Note(60),
    Note("c#4+"),
    Note("4Eb"),
    Note("4E+20"),
    Note("4G-10hz"),
    Note("442hz"),
])
seq.show()

Error:

Default path for soundfonts only defined in linux
The file /Users/mypath/Library/Caches/tmpm9x0s0g0/4_dexb2d.png does not exist.

I am on macbook M1 Pro, Sonoma 14.4.

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