pysca 0.1.0

Requirements

Pysca runs with Python version 2.6 and 2.7; there is currently no support for Python 3. It depends on the following Python packages:

• NumPy, version 1.4.1 or newer

• SciPy, version 0.7.2 or newer

• PyFITS, version 2.3.1 or newer

If you use the pip package manager (see below), these packages will be (if neccessary) automatically downloaded and installed. Note however that pip will install these packages from source and that the build process might take quite some time (especially for the rather large SciPy package). So it might be a good idea to install a pre-compiled version of these packages (e.g. by using the package manager of your Linux distribution) before you install Pysca.

Installation

The prefered way to install Pysca is to use the pip:

pip install --user pysca

This way Pysca will be installed completely into the user’s home directory. The pysca executable will be installed to:

    $HOME/.local/bin/pysca                       (Linux, MacOS w/ Python 2.6)
or  $HOME/Library/Python/X.Y/bin/pysca                  (MacOS w/ Python 2.7)

where X.Y is the Python version (i.e. 2.7) and the pysca library will be installed under:

    $HOME/.local/lib/pythonX.Y/site-packages     (Linux, MacOS w/ Python 2.6)
or  $HOME/Library/Python/X.Y/lib/python/site-packages   (MacOS w/ Python 2.7)

Another advantage of pip is, that you can easily upgrade Pysca to the latest version, by entering:

pip install --user -U --no-deps pysca

or completely uninstall Pysca using the following command:

pip uninstall pysca

To run the pysca executable, you have to make sure, that it is in your PATH, by either adding the directory, where the executable was installed, to your PATH environment variable, e.g. using the Bash:

export PATH=$HOME/.local/bin/pysca:$PATH

or by creating a symlink of the binary to a directory which is already included in your PATH environment variable, e.g.:

ln -s $HOME/.local/bin/pysca $HOME/bin/

If you, for any reason, don’t want to use pip or any other Python installer (like easy_install), you can also download the .tar.gz file, extract it to some directory and then source the provided env_pysca.sh script:

tar -xzf pysca-x.y.z.tar.gz
source pysca-x.y.z/env_pysca.sh

Note however, that this script only works with the Bash; if you are using the C shell or anyting else, you can still use Pysca without using pip, but you have to set the PYTHONPATH and PATH environment variables by your self.