Indepedent Gaussian mixture CV error about roundtrip HOT 2 CLOSED

I am running codes using TF 1.31.1 Python 3.7 venv. when I try to run example (1), when the Cross Validation starts I got runtime issues.
I used following command for faster run time debugging.

CUDA_VISIBLE_DEVICES=0 python main_density_est.py  --dx 2 --dy 2 --train True --data indep_gmm --epochs 10  --cv_epoch 3 --patience 5

When the CV starts at epoch 3 the following runtime warning shows

/home/connor/Roundtrip/venv/lib/python3.7/site-packages/numpy/core/fromnumeric.py:3420: RuntimeWarning: Mean of empty slice.  out=out, **kwargs)
/home/connor/Roundtrip/venv/lib/python3.7/site-packages/numpy/core/_methods.py:188: RuntimeWarning: invalid value encountered in double_scalars
  ret = ret.dtype.type(ret / rcount)
/home/connor/Roundtrip/venv/lib/python3.7/site-packages/numpy/core/_methods.py:262: RuntimeWarning: Degrees of freedom <= 0 for slice
  keepdims=keepdims, where=where)
/home/connor/Roundtrip/venv/lib/python3.7/site-packages/numpy/core/_methods.py:222: RuntimeWarning: invalid value encountered in true_divide
  subok=False)
/home/connor/Roundtrip/venv/lib/python3.7/site-packages/numpy/core/_methods.py:253: RuntimeWarning: invalid value encountered in double_scalars
  ret = ret.dtype.type(ret / rcount)

However the program keep running until it reaches last 2 IF conditions in function "train" it will have local variable referenced before assignment.
Any suggestions or solutions?
Thank you!

Neven met this error before. Roundtrip was developed in Python2.7 and Tensorflow 1.13.1.
Have you tried with python2?

from roundtrip.

solved with conda python 2.7 Thankyou

from roundtrip.