ufunc 'left_shift' not supported

[cfengno1]

Hi Huanchen,

I recently reinstalled block2, but some errors occur when I run the calculations.

First it gives me error:

Traceback (most recent call last):
  File "PhotoDoped_U1_cont.py", line 2, in <module>
    from block2.sany import *
ModuleNotFoundError: No module named 'block2.sany'; 'block2' is not a package

Then I delete "from block2.sany import *", but it gives me another error:

Traceback (most recent call last):
  File "PhotoDoped_U1_cont.py", line 22, in <module>
    driver = DMRGDriver(scratch="./tmp", symm_type=SymmetryTypes.SAny, n_threads=Nthreads, stack_mem=Nmem << 30, restart_dir="./MPS", clean_scratch=False)
TypeError: ufunc 'left_shift' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

Can you help?

Best,
Feng

[hczhai]

stack_mem must be an integer, rather than a floating point number. You can do stack_mem=int(Nmem) << 30 or stack_mem=int(Nmem * 1024 ** 3).