我在终端尝试了这个命令：
apt-get install libxml2-dev libxslt1-dev python-dev
但是我得到了
Package python-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
python
E: Unable to locate package libxml2-dev
E: Unable to locate package libxslt1-dev
E: Package 'python-dev' has no installation candidate
我尝试更新apt-get，仍然是同样的问题。