I just put up a new pyFreenet release (github):
If you have Python3 and pip >= 8 you can get it with pip3 install -U --user --egg pyFreenet3
. It provides a cleaned up fcpupload script with --spawn support (requires GNU/Linux):
pip3 install -U --user --egg pyFreenet3
echo 1 > testfile
fcpupload --spawn --fcpPort 9486 testfile