Packages for Anaconda can be installed via:
conda install -c paulscherrerinstitute cachannel
$ sudo pip install cachannel # macOS > C:\Python27\Scripts\pip.exe install cachannel :: Windows
PyPI does not allow upload linux-specific wheels package, yet (as of 2014). The old egg format is used then:
$ sudo easy_install cachannel
Or install only for the current user:
$ easy_install --user cachannel
If a binary package is not available for your system, you can build from source. If you have a valid EPICS base installation, as described by Getting EPICS, the C extension will be compiled. Otherwise it will instead use caffi as the backend.
The source can be downloaded in various ways:
On Linux, the python header files are normally provided by package like python-devel or python-dev.
numpy is optional, but it can boost the performace when reading large waveform PVs,
which are common for areaDetector images.
In general please follow the official installation instruction. Here is a short guide,
Get the source tarball from http://www.aps.anl.gov/epics/base/R3-14/12.php.
Unpack it to a proper path.
Set the following environment variables:
EPICS_BASE : the path containing the EPICS base source tree.
EPICS_HOST_ARCH : EPICS is built into static libraries on Windows.
OS Arch EPICS_HOST_ARCH Linux 32bit linux-x86 64bit linux-x86_64 Windows 32bit win32-x86 64bit windows-x64 macOS PPC darwin-ppcx86 Intel darwin-x86
As soon as the epics base libraries are ready, it is simple,
> C:\Python27\python.exe setup.py install
$ [sudo] python setup.py install
You might need to pass -E flag to sudo to preserve the EPICS environment variables. If your user account is not allowed to do so, a normal procedure should be followed,
$ su - # export EPICS_BASE=<epics base path> # export EPICS_HOST_ARCH=<epics host arch> # python setup.py install
After the build succeeds, you may want to create a package for distribution.
Conda recipe is included:
$ conda build -c paulscherrerinstitute conda-recipe
$ python setup.py bdist_wheel
The spec file python-CaChannel.spec is included. Get the source tarball either from PyPI or create it by
python setup.py sdist, and run:
$ rpmbuild -ta CaChannel-3.0.0.tar.gz
The binary and source RPM will be created. The package name is python-CaChannel.