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[英]I have nlopt installed but get the message: no module named 'nlopt'
[英]ModuleNotFoundError: No module named '_nlopt'
我在 Python 3.7.4 中导入 nlopt 库时遇到问题。
我正在使用 anaconda,但由于 nlopt 无法通过 conda install 使用,我已经使用 pip 安装了 nlopt。
这是错误消息:
>>> import nlopt
Traceback (most recent call last):
File "C:\Users\nick.rhodes\AppData\Local\Continuum\anaconda3\lib\site-packages\nlopt\nlopt.py", line 22, in swig_import_helper
return importlib.import_module(mname)
File "C:\Users\nick.rhodes\AppData\Local\Continuum\anaconda3\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 670, in _load_unlocked
File "<frozen importlib._bootstrap>", line 583, in module_from_spec
File "<frozen importlib._bootstrap_external>", line 1043, in create_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
ImportError: DLL load failed: The specified module could not be found.
During handling of the above exception, another exception occurred:
File "<stdin>", line 1, in <module>
File "C:\Users\nick.rhodes\AppData\Local\Continuum\anaconda3\lib\site-packages\nlopt\__init__.py", line 1, in <module>
from .nlopt import *
File "C:\Users\nick.rhodes\AppData\Local\Continuum\anaconda3\lib\site-packages\nlopt\nlopt.py", line 25, in <module>
_nlopt = swig_import_helper()
File "C:\Users\nick.rhodes\AppData\Local\Continuum\anaconda3\lib\site-packages\nlopt\nlopt.py", line 24, in swig_import_helper
return importlib.import_module('_nlopt')
File "C:\Users\nick.rhodes\AppData\Local\Continuum\anaconda3\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
ModuleNotFoundError: No module named '_nlopt'
由于您使用的是 conda,您应该使用conda安装nlopt
conda install -c conda-forge nlopt
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