如何通过 xlwings 包导入 numpy？ “导入错误：DLL 加载失败：找不到指定的模块。”

Question

I'm trying to use the 'Run Python' function of xlwings to run Python code through VBA.

I have been using Spyder to execute my code and it runs with no errors.

When trying to run this from VBA with the xlwings package I receive:

"ImportError: DLL load failed: The specified module could not be found."

and this error relates to the numpy package.

I tried uninstalling and reinstalling the anaconda package and using pip install numpy .

I checked that I have the most up to date version of xlwings 0.15.8.

I found this thread https://github.com/xlwings/xlwings/issues/954 stating this issue was fixed with version 0.15.7 of xlwings.

VBA code:

RunPython ("import Demand; Demand.calibrate_Demand()")

Spyder code:

import numpy as np
import xlwings as xw
import pandas as pd
import statsmodels.api as sm
from statsmodels.tsa.arima_model import ARMA
from statsmodels.tsa.arima_model import ARMAResults
from matplotlib import pyplot as plt
import datetime

def calibrate_dDemand():

My Python file is called Demand.py

When executing my VBA code I receive the following error:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "e:\julia\calibration automation\Demand.py", line 17, in <module>
    import numpy as np
  File "C:\Users\julia\AppData\Local\Continuum\anaconda3\lib\site-packages\numpy\__init__.py", line 140, in <module>
    from . import _distributor_init
  File "C:\Users\julia\AppData\Local\Continuum\anaconda3\lib\site-packages\numpy\_distributor_init.py", line 34, in <module>
    from . import _mklinit
ImportError: DLL load failed: The specified module could not be found.

If I place import pandas as pd first (before importing numpy) I receive this error

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "e:\julia\calibration automation\Demand.py", line 19, in <module>
    import pandas as pd
  File "C:\Users\julia\AppData\Local\Continuum\anaconda3\lib\site-packages\pandas\__init__.py", line 19, in <module>
    "Missing required dependencies {0}".format(missing_dependencies))
ImportError: Missing required dependencies ['numpy']

Answer 1

I've been trying for a couple of weeks to hit back against this problem too.
I have a company-owned laptop which is severely restricted to what environment variables I have access too, and PATH is not one of them.
I have no trouble linking Excel with Python (Spyder / Anaconda3 installation), but as soon as add import numpy as np to my python code, I get the same DLL load failed error. (It didn't always do this though, it just started doing it overnight for no reason I can fathom, but I digress). The code itself works fine in Spyder though.
I did eventually find something of a workaround though, but it's a bit of a last resort, being more than a bit awkward and daft. Maybe useful for a developer to track down a more sensible solution though?
Anyway, I found that if I launched Excel from Spyder, the numpy module correctly imports, and remains stable. To do this, I just access the contents of one of the workbook's cells without having Excel already open. This launches Excel, opens the workbooks, and correctly imports numpy.
What do you think?