Problema con l'installazione di matplotlib in Python [duplicato]

Question

Sto cercando di installare matplotlib in Windows x64 con Python 3.9. Quando io faccio:

pip installa matplotlib

Ottengo questo errore:

ERROR: Command errored out with exit status 1:
 command: 'c:\program files\python39\python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\Luca\\AppData\\Local\\Temp\\pip-install-zlfu5f08\\kiwisolver\\setup.py'"'"'; __file__='"'"'C:\\Users\\Luca\\AppData\\Local\\Temp\\pip-install-zlfu5f08\\kiwisolver\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:\Users\Luca\AppData\Local\Temp\pip-pip-egg-info-mriih1bh'
     cwd: C:\Users\Luca\AppData\Local\Temp\pip-install-zlfu5f08\kiwisolver\
Complete output (44 lines):
WARNING: The wheel package is not available.
  ERROR: Command errored out with exit status 1:
   command: 'c:\program files\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\Luca\\AppData\\Local\\Temp\\pip-wheel-pvxhkv11\\cppy\\setup.py'"'"'; __file__='"'"'C:\\Users\\Luca\\AppData\\Local\\Temp\\pip-wheel-pvxhkv11\\cppy\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d 'C:\Users\Luca\AppData\Local\Temp\pip-wheel-1s8s6o5r'
       cwd: C:\Users\Luca\AppData\Local\Temp\pip-wheel-pvxhkv11\cppy\
  Complete output (6 lines):
  usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
     or: setup.py --help [cmd1 cmd2 ...]
     or: setup.py --help-commands
     or: setup.py cmd --help

  error: invalid command 'bdist_wheel'
  ----------------------------------------
  ERROR: Failed building wheel for cppy
ERROR: Failed to build one or more wheels
Traceback (most recent call last):
  File "c:\program files\python39\lib\site-packages\setuptools\installer.py", line 128, in fetch_build_egg
    subprocess.check_call(cmd)
  File "c:\program files\python39\lib\subprocess.py", line 373, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['c:\\program files\\python39\\python.exe', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', 'C:\\Users\\Luca\\AppData\\Local\\Temp\\tmpggz7lusd', '--quiet', 'cppy>=1.1.0']' returned non-zero exit status 1.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\Luca\AppData\Local\Temp\pip-install-zlfu5f08\kiwisolver\setup.py", line 59, in <module>
    setup(
  File "c:\program files\python39\lib\site-packages\setuptools\__init__.py", line 164, in setup
    _install_setup_requires(attrs)
  File "c:\program files\python39\lib\site-packages\setuptools\__init__.py", line 159, in _install_setup_requires
    dist.fetch_build_eggs(dist.setup_requires)
  File "c:\program files\python39\lib\site-packages\setuptools\dist.py", line 699, in fetch_build_eggs
    resolved_dists = pkg_resources.working_set.resolve(
  File "c:\program files\python39\lib\site-packages\pkg_resources\__init__.py", line 779, in resolve
    dist = best[req.key] = env.best_match(
  File "c:\program files\python39\lib\site-packages\pkg_resources\__init__.py", line 1064, in best_match
    return self.obtain(req, installer)
  File "c:\program files\python39\lib\site-packages\pkg_resources\__init__.py", line 1076, in obtain
    return installer(requirement)
  File "c:\program files\python39\lib\site-packages\setuptools\dist.py", line 758, in fetch_build_egg
    return fetch_build_egg(self, req)
  File "c:\program files\python39\lib\site-packages\setuptools\installer.py", line 130, in fetch_build_egg
    raise DistutilsError(str(e)) from e
distutils.errors.DistutilsError: Command '['c:\\program files\\python39\\python.exe', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', 'C:\\Users\\Luca\\AppData\\Local\\Temp\\tmpggz7lusd', '--quiet', 'cppy>=1.1.0']' returned non-zero exit status 1.
----------------------------------------ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

Ho provato a seguire tutti i consigli che ho trovato qui, ma continua a generare l'errore.

Chi mi può aiutare, per favore?

Answer 1

Dovresti quindi eseguire di nuovo 'pip install matplotlib' dopo aver installato la ruota.

Nel mio caso, l'errore passa all'installazione del cuscino, dopo aver installato il cuscino con successo, posso finalmente installare anche matplotlib!

Answer 2

Provare

pip install wheel 

quindi riprova.

Answer 3

Dallo stacktrace sembra che la ruota non sia installata

Prova quanto segue

pip install wheel

quindi corri

python setup.py bdist_wheel

Come da documentazione PIP Wheel

Build System Interface¶
In order for pip to build a wheel, setup.py 
must implement the bdist_wheel command with the following syntax:

python setup.py bdist_wheel -d TARGET
This command must create a wheel compatible with the 
invoking Python interpreter, and save that wheel in the 
directory TARGET.

No other build system commands are invoked by the pip wheel command.

Answer 4

Ho avuto lo stesso errore. Dopo aver eseguito pip install wheelho eseguito l'installazione con il --prefer-binaryflag:

python -m pip install -U matplotlib --prefer-binary.

La documentazione legge quanto segue:

Se questo comando comporta la compilazione di Matplotlib dai sorgenti e si verificano problemi con la compilazione, è possibile aggiungere --prefer-binary per selezionare la versione più recente di Matplotlib per la quale è disponibile una ruota precompilata per il sistema operativo e Python.