Python cannot find dateutil.relativedelta

Question

I am trying to run a program using paster serve, but I keep getting the error:

ImportError: No module named dateutil.relativedelta

Answer 1

I had a similar issue but for a simpler reason. My fresh virtualenv simply didn't have dateutil installed and I didn't know the Python package name. I tried pip install dateutil, which obviously didn't work since the package name was incorrect. Running pip install python-dateutil instead worked (without resorting to sudo).