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Dependencies

It shouldn't take you more than a few minutes to download and install everything.

All platforms

Install Python 2.7.13 (32 or 64 bit) - make sure your 'bitness' is correct when downloading the other packages listed further below. Download Python from the official Python site. If you're using Linux or Mac, you most probably have Python installed already.

If you want to know on what platform you are, start Python and type:

import platform
platform.architecture()

ToPy requires Python 2.7 because of its dependence on Pysparse, which is only available in binary format for Python 2.7 on Windows systems and is too much trouble/bother to compile from scratch if you want to get up and running quickly. I've started to look into replacing Pysparse with something else that's as quick -- it will take me a while because I have a 'real' job.

The same is of course not true for Linux/Mac systems, so you may very well be able to get ToPy to work with Python 3.x -- I've not tried.

Consider to use a virtual Python 2.7 environment, using pyenv or conda or one of the other tools available to set up virtual environments for Python.

Windows

  1. Make sure Python is in your 'Path' Environment Variables. How? If you type 'python' in a command prompt (cmd window) and you don't get an error, you're OK.
    1. If you don't know how to add Python to 'Path', please search the web on how to do it. Tip: Start a new cmd window after you've made changes to the 'Path' Environment Variable.
    2. Check if Python works by typing it into a cmd shell.
    3. Check if pip works, also by typing it into a cmd shell. If it doesn't work, add Python27\Scripts to the Environment Variables, open a new cmd shell and check if it works.
    4. Note:- When using pip, run cmd as Administrator.
    5. Installing with pip is easy: pip install <package>
  2. Download NumPy+MKL for Python 2.7 from Christoph Gohlke's website: http://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy and install with pip
  3. Download Pysparse, also from http://www.lfd.uci.edu/~gohlke/pythonlibs/#pysparse and install with pip
  4. Install matplotlib via pip
  5. Install SymPy via pip
  6. Install PyVTK via pip

Linux

Install equivalent packages as for Windows above via pip or by other means (e.g., apt-get, yum, rpm,...). So, install he following:

  1. NumPy+MKL
  2. Pysparse
  3. matplotlib
  4. SymPy
  5. PyVTK

Mac

Install equivalent packages as for Linux above via pip or by other means.

Installing matplotlib and SymPy via other 'official' channels should also work fine (in that ToPy should still work).

If everything installed correctly, you're ready to install ToPy.

Installing ToPy

Download the stable topy release or clone.

CD into the 'topy' directory (where 'setup.py' is located) and in a terminal ('cmd' on Windows), type:

python setup.py install

or if you want to install locally, type:

python setup.py install --user

You may require Administrator rights on Windows, depending on your setup.

If there aren't any errors, then ToPy is installed. Congratulations!

Getting started

See https://github.com/williamhunter/topy/wiki/Tutorials

First run of ToPy

Element stiffness matrices

The first time you run ToPy after a new install you'll see the following in your terminal:

It seems as though all or some of the element stiffness matrices
do not exist. Creating them...
This is usually only required once and may take a few minutes.
SymPy is integrating: K for Q4bar...
Created C:\Users\William\Programming\ToPy\topy\data\Q4bar.K (stiffness matrix).
SymPy is integrating: K for Q4...
Created C:\Users\William\Programming\ToPy\topy\data\Q4.K (stiffness matrix).
SymPy is integrating: K for Q5B...
Created C:\Users\William\Programming\ToPy\topy\data\Q5B.K (stiffness matrix).
SymPy is integrating: K for Q4T...
Created C:\Users\William\Programming\ToPy\topy\data\Q4T.K (stiffness matrix).
SymPy is integrating: K for H8...
Created C:\Users\William\Programming\ToPy\topy\data\H8.K (stiffness matrix).
SymPy is integrating: K for H18B...
Created C:\Users\William\Programming\ToPy\topy\data\H18B.K (stiffness matrix).
SymPy is integrating: K for H8T...
Created C:\Users\William\Programming\ToPy\topy\data\H8T.K (stiffness matrix).

You won't (shouldn't) see it again, even if ToPy is updated, since these files shouldn't need to change. You can create the stiffness matrices without solving a problem by simply running 'optimise.py' in the 'scripts' folder.

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William Hunter Created: 2017-08-21 Last update: 2020-04-26