w90io.read_hr takes long time on windows

[Zijia-Cheng]

I have tried to use read_hr function on both windows and mac. It works smoothly on Mac, while it takes forever on windows(>15mins). It should not be related to computer performance as the windows computer should perform better than macbook. When I interrupt the kernal it always stops at this line:

KeyboardInterrupt Traceback (most recent call last)
in
----> 1 HR, Rvectors, Rweights = w90io.read_hr('wannier90_hr.dat')

D:\machine learning\python\lib\site-packages\wannier90_utils-0.1.0-py3.7.egg\w90utils\io_hr.py in read_hr(fname)
23
24 istart_hr = 3+ndegen_lines
---> 25 raw_data = np.fromstring(''.join(contents[istart_hr:]), sep='\n').reshape((-1, 7))
26
27 hr = raw_data[:, 5] + 1j*raw_data[:, 6]

KeyboardInterrupt:

[jimustafa]

Thank you @CZJ2020 for reporting the issue you are experiencing. Unfortunately, I do not have access to a Windows system. Could you try splitting the call into

tmp_str = ''.join(contents[istart_hr:])
raw_data = np.fromstring(tmp_str, sep='\n')
raw_data = raw_data.reshape((-1, 7))

and seeing which of those lines is causing it to hang.

Maybe it is the newline \n character on Windows... and it needs to be something like sep=os.linesep. Hope this helps, and please let me know what you find.