I have installed lxml on my AWS EC2 instance (Amazon Linux AMI), inside my virtualenv:

```
pip3 install lxml

```

and I got the following result:

```
Collecting lxml
  Using cached lxml-3.6.0.tar.gz
Installing collected packages: lxml
  Running setup.py install for lxml ... done
Successfully installed lxml

```

However, lxml appears not to be installed. When I import it in a python 3.4 script:

```
from lxml import html

```

I get the following error:

```
ImportError: No module named 'lxml'

```

Furthermore, if I run:

```
pip3 uninstall lxml

```

I get

```
Cannot uninstall requirement lxml, not installed

```

What am I doing wrong?