xgb_gbc.predict_proba(test_feature) Invalid missing value: null

[lvqiujie]

Hello, I met the following problem when reproducing your code, I would like to ask you for advice, looking forward to your reply.

`Traceback (most recent call last):
File "××××××××××××××××××/XGraphBoost-main/dmpnn_xgboost/train.py", line 13, in
model = cross_validate(args, logger)
File "××××××××××××××××××/XGraphBoost-main/dmpnn_xgboost/chemprop/train/cross_validate.py", line 64, in cross_validate
train_morgan_feature,val_morgan_feature,test_morgan_feature,test_preds)
File "××××××××××××××××××/XGraphBoost-main/dmpnn_xgboost/morgan_feature.py", line 212, in xgboost_cv
pre_pro = xgb_gbc.predict_proba(test_feature)[:, 1]
File "××××××××××××××××××/anaconda3/envs/lv/lib/python3.6/site-packages/xgboost/sklearn.py", line 1354, in predict_proba
iteration_range=iteration_range
File "××××××××××××××××××/anaconda3/envs/lv/lib/python3.6/site-packages/xgboost/sklearn.py", line 887, in predict
validate_features=validate_features,
File "××××××××××××××××××/anaconda3/envs/lv/lib/python3.6/site-packages/xgboost/core.py", line 2042, in inplace_predict
ctypes.byref(preds),
File "××××××××××××××××××/anaconda3/envs/lv/lib/python3.6/site-packages/xgboost/core.py", line 218, in _check_call
raise XGBoostError(py_str(_LIB.XGBGetLastError()))
xgboost.core.XGBoostError: [17:59:57] ../src/c_api/c_api_utils.h:161: Invalid missing value: null
Stack trace:
[bt] (0) /anaconda3/envs/lv/lib/python3.6/site-packages/xgboost/lib/libxgboost.so(+0x972bd) [0x7f0a83d572bd]
[bt] (1) /anaconda3/envs/lv/lib/python3.6/site-packages/xgboost/lib/libxgboost.so(+0xaed9c) [0x7f0a83d6ed9c]
[bt] (2) /anaconda3/envs/lv/lib/python3.6/site-packages/xgboost/lib/libxgboost.so(+0xb4ebf) [0x7f0a83d74ebf]
[bt] (3) /anaconda3/envs/lv/lib/python3.6/site-packages/xgboost/lib/libxgboost.so(XGBoosterPredictFromDense+0x28d) [0x7f0a83d5b4ad]
[bt] (4) /anaconda3/envs/lv/lib/python3.6/lib-dynload/../../libffi.so.7(+0x69dd) [0x7f0b14bf69dd]
[bt] (5) /anaconda3/envs/lv/lib/python3.6/lib-dynload/../../libffi.so.7(+0x6067) [0x7f0b14bf6067]
[bt] (6) /anaconda3/envs/lv/lib/python3.6/lib-dynload/_ctypes.cpython-36m-x86_64-linux-gnu.so(_ctypes_callproc+0x2ce) [0x7f0b14c0ed0e]
[bt] (7) /anaconda3/envs/lv/lib/python3.6/lib-dynload/_ctypes.cpython-36m-x86_64-linux-gnu.so(+0x13745) [0x7f0b14c0f745]
[bt] (8) /anaconda3/envs/lv/bin/python3.6(_PyObject_FastCallDict+0x8b) [0x55b1f3ca50bb]

Process finished with exit code 1
`