Re: Lilypond and Python

[Federico Bruni]

Il giorno dom 1 nov 2020 alle 17:07, Stefan Thomas 
<kontrapunktstefan@gmail.com> ha scritto:
> many thanks to Your fast reply. But unfortunately it didn't work. It 
> seems to be a python problem:
> pip install setuptools
> Collecting setuptools
>
> Using cached 
> https://files.pythonhosted.org/packages/e1/b7/182161210a13158cd3ccc41ee19aadef54496b74f2817cc147006
> ec932b4/setuptools-44.1.1-py2.py3-none-any.whl
> Installing collected packages: setuptools
> Exception:
> Traceback (most recent call last):
>  File 
> "/home/stefan/.local/lib/python2.7/site-packages/pip/basecommand.py", 
> line 215, in main
>    status = self.run(options, args)
>  File 
> "/home/stefan/.local/lib/python2.7/site-packages/pip/commands/install.py", 
> line 342, in run
>    prefix=options.prefix_path,
>  File 
> "/home/stefan/.local/lib/python2.7/site-packages/pip/req/req_set.py", 
> line 784, in install
>    **kwargs
>  File 
> "/home/stefan/.local/lib/python2.7/site-packages/pip/req/req_install.py", 
> line 851, in install
>    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
>  File 
> "/home/stefan/.local/lib/python2.7/site-packages/pip/req/req_install.py", 
> line 1064, in move_wheel_files
>    isolated=self.isolated,
>  File "/home/stefan/.local/lib/python2.7/site-packages/pip/wheel.py", 
> line 345, in move_wheel_files
>    clobber(source, lib_dir, True)
>  File "/home/stefan/.local/lib/python2.7/site-packages/pip/wheel.py", 
> line 323, in clobber
>    shutil.copyfile(srcfile, destfile)
>  File "/usr/lib/python2.7/shutil.py", line 97, in copyfile
>    with open(dst, 'wb') as fdst:
> IOError: [Errno 13] Permission denied: 
> '/usr/local/lib/python2.7/dist-packages/easy_install.py'

You are using pip2 (python2) installed in ~/.local, but you're trying 
to install a py3 wheel.
pip2 install seems to try to install under /usr/local by default¹, but 
it won't work unless you use sudo.


I would try:

pip3 install --user setuptools


¹ pip3 is smarter and doesn't need the --user switch if called as 
regular user, see below:

$ pip -V
pip 20.2.2 from /usr/lib/python3.9/site-packages/pip (python 3.9)
$ pip install setuptools
Defaulting to user installation because normal site-packages is not 
writeable
Requirement already satisfied: setuptools in 
/usr/lib/python3.9/site-packages (49.1.3)