Data folder does not exist

[s1291]

Hello,

I installed welib and tried an example to modify an AeroDyn15 polar file, but it fails because it cannot use the template file:

On Windows, the data folder does not exist inside welib folder as needed to retrieve the template here on this line

Here is the error message:

In [1]: import numpy as np

In [2]: import os

In [3]: from welib.airfoils.Polar import Polar

In [4]: from welib.airfoils.Polar import Polar

In [5]: from welib.weio.csv_file import CSVFile

In [6]: AD_polarFile_in = os.path.join('./', 'airfoil01.dat')

In [7] polar = Polar(AD_polarFile_in, fformat='ADPolar')

In [8]: AD_polarFile_out = '_Polar_out.dat.ignore'


In [8]: polar.Re
Out[8]: nan

In [9]: polar.Re
Out[9]: nan

In [10]: comment = 'Cylinder at Re=6Million\nUpdated unsteady parameters' # Optional comment

In [11]: Re = 6


In [12]: ADpol = polar.toAeroDyn(AD_polarFile_out, Re=6, comment=comment)
---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
Cell In[12], line 1
----> 1 ADpol = polar.toAeroDyn(AD_polarFile_out, Re=6, comment=comment)

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\welib\airfoils\Polar.py:1124, in Polar.toAeroDyn(self, filenameOut, templateFile, Re, comment, unsteadyParams)
   1122     ADpol = templateFile
   1123 else:
-> 1124     ADpol = ADPolarFile(templateFile)
   1126 # --- Updating the AD polar file
   1127 ADpol['Re'] = Re # TODO UNKNOWN

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\welib\weio\fast_input_file.py:1903, in ADPolarFile.__init__(self, filename, hasUA, numTabs, **kwargs)
   1902 def __init__(self, filename=None, hasUA=True, numTabs=1, **kwargs):
-> 1903     FASTInputFileBase.__init__(self, filename, **kwargs)
   1904     if filename is None:
   1905         # Define a prototype for this file format
   1906         self.addComment('! ------------ AirfoilInfo Input File ------------------------------------------')

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\welib\weio\fast_input_file.py:244, in FASTInputFileBase.__init__(self, filename, IComment, **kwargs)
    242 if filename:
    243     self.filename = filename
--> 244     self.read(IComment=IComment)

File ~\AppData\Local\Programs\Python\Python312\Lib\site-packages\welib\weio\fast_input_file.py:381, in FASTInputFileBase.read(self, filename, IComment)
    379 if self.filename:
    380     if not os.path.isfile(self.filename):
--> 381         raise OSError(2,'File not found:',self.filename)
    382     if os.stat(self.filename).st_size == 0:
    383         raise EmptyFileError('File is empty:',self.filename)

FileNotFoundError: [Errno 2] File not found:: 'C:\\Users\\s1291\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\welib\\airfoils\\../../data/NREL5MW/5MW_Baseline/Airfoils/Cylinder1.dat'

[ebranlard]

Thanks for pointing this out, that is a fair point, the data is not shipped with pypi. I would have to look into that.

In the meantime, you can do:

   polar.toAeroDyn(AD_polarFile_out, Re=6, templateFile = 'path/to/a/aerodyn_airfoil.dat')