Thanks Chris for replying, but it didn't work. The upgrade happened, but still python can't see numpy! So it seems to be a path problem. The numpy (and scipy and matplotlib) files are there, so surely in principle it's a simple matter of pointing my python path at them?
Any ideas how? (I should add, the reason I upgraded python from source in the first place is that "apt-get" claimed python was up to date). p.s. Here's an abridged log: peter@sirboris:~$ which python /usr/local/bin/python peter@sirboris:~$ pip The program 'pip' is currently not installed. You can install it by typing: sudo apt-get install python-pip peter@sirboris:~$ sudo apt-get install python-pip [lots of output, pip installed] peter@sirboris:~$ which pip /usr/bin/pip peter@sirboris:~$ sudo pip install numpy Requirement already satisfied (use --upgrade to upgrade): numpy in /usr/lib/python2.7/dist-packages Cleaning up... peter@sirboris:~$ sudo pip install numpy --upgrade [lots and lots of output, successful install] peter@sirboris:~$ python Python 2.7.12 (default, Dec 11 2016, 22:16:38) [GCC 4.6.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import numpy Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named numpy >>> import sys >>> sys.path ['', '/home/peter', '/home/peter/dvd/software/python', '/home/peter/Cython-0.25.2', '/usr/local/lib/python27.zip', '/usr/local/lib/python2.7', '/usr/local/lib/python2.7/plat-linux2', '/usr/local/lib/python2.7/lib-tk', '/usr/local/lib/python2.7/lib-old', '/usr/local/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/site-packages'] # [Then I thought, maybe "pip" and "python -m pip" are different, so...] peter@sirboris:~$ sudo python -m pip install numpy /usr/local/bin/python: No module named pip -- https://mail.python.org/mailman/listinfo/python-list
