For more information see the full pyAMI documentation

pyAMI 4 is a major upgrade of the AMI python client. The command line syntax has been rationalized, with improved help functions. pyAMI is available in the ATLAS software release and also installed centrally on lxplus. pyAMI can be installed standalone on a laptop. Instructions are given below for linux and windows.

All commands are simply subcommands of ami.

List AOD datasets matching a pattern:

ami list datasets --type AOD data11_7TeV

list files in a dataset:

ami list files -lhc dataset.name

list latest NTUP_TAUMEDIUM data datasets (and number of events in each one) originating from AOD in periods L1 and L2 that are contained in a good runs list (GRL):

ami list data --project data11_7TeV --type NTUP_TAUMEDIUM --parent-type AOD \
--periods L1,L2 --stream physics_JetTauEtmiss --latest --fields events \
--grl mygrl.xml

list runs in a period or multiple periods:

ami list runs B M

display dataset metadata:

ami dataset info dataset.name

and query projects, data types, dataset provenance, etc. pyAMI also provides an API allowing you to perform all of the same queries from within your own Python program.

pyAMI is installed centrally on LXPLUS at CERN. To begin using pyAMI simply:

source /afs/cern.ch/atlas/software/tools/pyAMI/setup.sh

then authenticate yourself if you haven't already (see below).

pyAMI is also available through CVMFS:

export ATLAS_LOCAL_ROOT_BASE=/cvmfs/atlas.cern.ch/repo/ATLASLocalRootBase 
source $ATLAS_LOCAL_ROOT_BASE/user/atlasLocalSetup.sh
localSetupPyAMI

Note : You may need to get a particular version of pyAMI - SLC6 requires:

source /afs/cern.ch/atlas/software/tools/pyAMI/python2.6/setup.sh

pyAMI requires at least Python 2.4. lxml is optional but required for XSL transformations. libxml2 and libxslt (dev packages) must be installed to build lxml.

Automatically install the latest version of pyAMI with pip:

pip install --user pyAMI

or with easy_install:

easy_install --user pyAMI

Omit the --user for a system-wide installation (requires root privileges). Add ${HOME}/.local/bin to your ${PATH} if using --user and if it is not there already (put this in your .bashrc):

export PATH=${HOME}/.local/bin${PATH:+:$PATH}

To upgrade an existing installation use the -U option in the pip or easy_install commands above.

Get the latest tarball on PyPI

Untar and install (replace X appropriately):

tar -zxvf pyAMI-X.tar.gz
cd pyAMI-X

pyAMI uses distribute to install but you may revert to a basic distutils install by setting the environment variable:

export PYAMI_NO_DISTRIBUTE=1

One advantage of using distribute is that all dependencies are automatically downloaded and installed for you. To install pyAMI into your home directory if using at least Python 2.6:

python setup.py install --user

or with older Python versions:

python setup.py install --prefix=~/.local

Add ${HOME}/.local/bin to your ${PATH} if it is not there already (put this in your .bashrc):

export PATH=${HOME}/.local/bin${PATH:+:$PATH}

If you are unable to satisfy the dependency on lxml (only used for XSL transformations) then you may disable this dependency before installation with:

export PYAMI_NO_LXML=1

Tested with System: OXS 10.7.4, Python 2.7.1, GCC 4.2.1

Just follow the instructions for Manual Installation, except that to change the PATH you should do:

export PATH=/Users/yourName/Library/Python/2.7/bin${PATH:+:$PATH}

1. Install python, for example Python 2.7.3
2. Install distribute (for easy installation of dependences). For 64 bit machines there may be problems, see bugs.python.org/issue6792.
3. Download pip. For example pip-1.1.tar.gz.

4. Install pip. Open a "cmd" terminal in windows. Assuming that you installed pip below Python:

   cd C:\Python27\pip-1.1
   C:\Python27\python setup.py install

5. Install pyAMI. pip.exe should be in C:\Python27\Scripts:

   cd C:\Python27\Scripts
   pip install pyAMI

6. You might need to install lxml to enable XSLT in a different step - sometimes pip seems to prefer a version which will not build. If you don't install lxml, pyAMI will still work, but you will only be able to obtain XML output on the command line. However if you only want to use the API of pyAMI you may skip this step.:

   easy_install --allow-hosts=lxml.de,*.python.org lxml==2.2.8

7. Now so that you can use pyAMI conveniently you must adjust your paths in the Windows environment. If you do not know how to do this follow the instructions here www.java.com/en/download/help/path.xml. Add to the path:

   PATH    C:\PYTHON27;C:\PYTHON27\Scripts

8. Lastly explain to Windows that a python script can be executed. Add to the PATHEXT variable:

   PATHEXT .PY

9. Then change the name of the file ami in C:\Python27\Scripts to ami.py so that script ami.py can be executed just by typing ami.

VOMS authentication is supported:

voms-proxy-init -voms atlas

The alternative option (if gLite is not available) is to send your username and password along with each AMI command. You can do this explicitly, or you can set up an encrypted configuration file by running:

ami auth

This will prompt you for your AMI username and password. You will only need to do this once since your credentials are stored in ~/.pyami/ami.cfg for later use. If your credentials change just run ami auth again. If you would like to keep your pyAMI configuration in a directory other than ~/.pyami then set the environment variable PYAMI_CONFIG_DIR.