UserWarnings differ for identical initializations when run several times
Posted: 02 Aug 2022, 09:27
I have a frequent issue with
When run for the 1st time (i.e. with a freshly restarted python kernel), the last info by
However, running the code between '-- snip --' and '-- snap --' repeatedly, and starting with the 2nd run the info by
Why does
UserWarning
s regarding unused options
in as such that they differ for identical(?) code, run several times. Typically this happens when initializing some tenpy
algorithm. E.g.:
Code: Select all
import logging
logging.basicConfig(level=logging.INFO) # allow for some UserWarnings
# Next, prepare some MPS 'psi' and have some model 'h'. Now do
# --------------------------- snip ---------------------
dt = 0.01
dtmes = 0.05
EMEopt = {
'compression_method': 'SVD',
'dt': dt,
'N_steps': int(np.ceil(dtmes/dt)),
'preserve_norm': True,
'trunc_params': {
'chi_max': 50,
'svd_min': 1.e-10,
'trunc_cut': None
}
}
# set e.g. an evolution engine
eng = ExpMPOEvolution(psi,h,EMEopt)
# --------------------------- snap ---------------------
tenpy
is
Code: Select all
INFO:tenpy.tools.params:ExpMPOEvolution: subconfig 'trunc_params'=Config(<3 options>, 'trunc_params')
tenpy
changes into
Code: Select all
INFO:tenpy.tools.params:ExpMPOEvolution: subconfig 'trunc_params'=Config(<3 options>, 'trunc_params')
/home/xaver/.anaconda3/envs/py/lib/python3.9/site-packages/tenpy/tools/params.py:233: UserWarning: unused options for config ExpMPOEvolution:
['N_steps', 'compression_method', 'dt', 'preserve_norm']
warnings.warn(msg.format(keys=sorted(unused), name=self.name))
/home/xaver/.anaconda3/envs/py/lib/python3.9/site-packages/tenpy/tools/params.py:233: UserWarning: unused options for config trunc_params:
['chi_max', 'svd_min', 'trunc_cut']
warnings.warn(msg.format(keys=sorted(unused), name=self.name))
-
ExpMPOEvolution
not use its options? -
ExpMPOEvolution
only complain about this starting with the 2nd run?