You seem to have a clash between python 2 and 3. First, make sure, you actually run (only) python 2. Most systems have both installed these days. You can check with 'python --version'.

Also try to use pip to install future. You should use the suggested command with sudo: 'sudo pip install future'

I have exactly the same problem, used sudo pip install future to no avail! Any other tips?

Here is solution (thanks to Cymon Cox):

sudo apt-get install future

sudo apt-get install python-scipy

Check if you have python in /usr/bin and the version: (everything within "" is the command)

"/usr/bin/python"

You should get something like this:

Python 2.7.12 (default, Nov 19 2016, 06:48:10)

[GCC 5.4.0 20160609] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>>

Type "import future"

Type "import past"

move into the p4 directory

"/usr/bin/python setup.py build"

"sudo usr/bin/python setup.py install"

"cd; p4"

This should show the p4 menu:

Using the p4 script, after reading in the (optional) files on the

command line, p4 goes interactive unless one of the files on the

command line is a Python script. Use the -i option if you want to go

interactive even if you are running a script. Use the -x option to

force exit, even if there was no Python script read. If you use the

-d option, then p4 draws any trees that are read in on the command

line, and then exits.

Peter Foster

The Natural History Museum, London

[email protected]

See the examples in /usr/local/share/doc/p4/Examples

(Control-d to quit.)

p4>

Good luck!

Rita

Thank Christian Henkel!  Using the "find" command,  found that we  have both installed python 2 and 3 on our linux server.  But when I typed "python --version" in the command line, python 2.6 appeared.t Then used sudo pip install future to no avail! I have countered the same problem as used sudo pip install future to no avail! But now it seems that I have installed p4 succesfully using the previous downloaded version p4-phylogenetics-4491de464e68.tar.gz instead of p4-phylogenetics-4491de464e68.tar. Thanks again for Christian Henkel's help!

Thanks Rita Castilho for your detailed reply! is is really detailed! Form that command "sudo apt-get install future", I guess that your system is probably Ubuntu! Am I wright? But my system is Centos. Nevertheless, Thanks again for your kind help! I don't know which installation manual you are follwing. It seems that I have installed P4 succesfully on my linux server using the previous downloaded source version p4-phylogenetics-4491de464e68.tar. gz following the manual in the directory after installing some packages. In the end, Thanks again for your kind and detailed reply! Best wishes for you!