./networkx-1.8.1.tar.gz already exists, skipping download ./networkx_reference.pdf already exists, skipping download ./networkx_tutorial.pdf already exists, skipping download ./networkx-documentation.zip already exists, skipping download Getting https://pypi.python.org/packages/source/n/networkx/networkx-1.8.1.tar.gz to ./networkx-1.8.1.tar.gz Getting http://networkx.github.io/documentation/latest/_downloads/networkx_reference.pdf to ./networkx_reference.pdf Getting http://networkx.github.io/documentation/latest/_downloads/networkx_tutorial.pdf to ./networkx_tutorial.pdf Getting http://networkx.github.io/documentation/latest/_downloads/networkx-documentation.zip to ./networkx-documentation.zip