我们可能有相同的问题.

We probably have the same problem.

我通过明确告诉Python在哪里找到xgboost库来解决它.

I solved it by telling Python explicitly where to find xgboost library.

原因是我有多个脚本，名称为xgboost.py. Python可能错误地导入了其中一个，因此找不到'DMatrix'的定义.

The reason is that I have more than one scripts with the name xgboost.py. Python might have imported one of them mistakenly, so that it cannot find the definition of 'DMatrix'.

这是我使用的命令:

export PYTHONPATH=~/xgboost/python-package

您应将〜/xgboost/python-package"更改为/xgboost/python-package/setup.py文件所在的文件夹.

You should change '~/xgboost/python-package' into the folder where your /xgboost/python-package/setup.py file located.