从 numba 导入 jit 会引发错误

Question

So I'm trying to import jit from the numba library but the import produces an OSError and says that a specific module couldn't be found. I tried to uninstall and reinstall numba, but it didn't change anything and I have no other idea to solve the issue.

Here is the full error:

Traceback (most recent call last):
  File "D:\Users\user65\Logiciels\WinPython-64bit-3.4.4.6Qt5\python-3.4.4.amd64\lib\site-packages\llvmlite\binding\ffi.py", line 42, in <module>
    lib = ctypes.CDLL(os.path.join(_lib_dir, _lib_name))
  File "D:\Users\user65\Logiciels\WinPython-64bit-3.4.4.6Qt5\python-3.4.4.amd64\lib\ctypes\__init__.py", line 350, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: [WinError 126] Le module spécifié est introuvable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:/Users/user65/HypotheseDecoupageReseau/CalculInfluence.py", line 6, in <module>
    from numba import jit
  File "D:\Users\user65\Logiciels\WinPython-64bit-3.4.4.6Qt5\python-3.4.4.amd64\lib\site-packages\numba\__init__.py", line 11, in <module>
    from . import config, errors, runtests, types
  File "D:\Users\user65\Logiciels\WinPython-64bit-3.4.4.6Qt5\python-3.4.4.amd64\lib\site-packages\numba\config.py", line 11, in <module>
    import llvmlite.binding as ll
  File "D:\Users\user65\Logiciels\WinPython-64bit-3.4.4.6Qt5\python-3.4.4.amd64\lib\site-packages\llvmlite\binding\__init__.py", line 6, in <module>
    from .dylib import *
  File "D:\Users\user65\Logiciels\WinPython-64bit-3.4.4.6Qt5\python-3.4.4.amd64\lib\site-packages\llvmlite\binding\dylib.py", line 4, in <module>
    from . import ffi
  File "D:\Users\user65\Logiciels\WinPython-64bit-3.4.4.6Qt5\python-3.4.4.amd64\lib\site-packages\llvmlite\binding\ffi.py", line 47, in <module>
    lib = ctypes.CDLL(_lib_name)
  File "D:\Users\user65\Logiciels\WinPython-64bit-3.4.4.6Qt5\python-3.4.4.amd64\lib\ctypes\__init__.py", line 350, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: [WinError 126] Le module spécifié est introuvable

Process finished with exit code 1

Thank you for your help :)

Answer 1

As said in this page you are not alone. This is the problem of the version 3.4.4

You have some options:

1. Try upgrading and see that the problem solves.

2. Aside from that people saying It's due to script\\python.bat and python.exe interfering.
   python.bat is currently calling ptpython when it sees it, which has not the same syntax.
   You may try pip uninstall ptpython and see if it helps.

3. You may also copy the current python.bat as winpython.bat , and keep python.bat calling only python:

@echo off
call "%~dp0env_for_icons.bat"
cd/D "%WINPYWORKDIR%"
rem backward compatibility for python.exe
"%WINPYDIR%\python.exe"  %*

4. After following the above solutions, llvmlite error part should be solved by now. You should have Visual Studio 2015 installed for other error parts to go away.
   Although you can instead install vc_redist.x86.exe alone from this link and dont install the whole VS2015. Follow here for more information.

Answer 2

Check if you are using a compatible version of Python.

In my case I had to remove Python and downgrade to a previous version