gfal2-python is a C++ library offering a thin layer of Python wrappers via PyBoost.
We recommend installing it via RPMs, but it is also available on PyPI/gfal2-python.
The Gfal2 Python bindings are intended to be easy to use.
Before jumping into usage, ensure you have a proxy certificate
available in the default location (/tmp/x509up_u$(id -u)).
Optionally, you may want to install relevant Gfal2 protocol plugins. Our example will use HTTP protocol, so we must ensure we have the Gfal2 HTTP plugin installed:
$ dnf install -y gfal2-plugin-httpExample of stating a file location:
import gfal2
ctx = gfal2.creat_context()
ctx.stat("https://eospublic.cern.ch/eos/opstest/dteam/file.test")Example of copying a file from local to remote:
import gfal2
ctx = gfal2.creat_context()
ctx.filecopy("file:///tmp/file.test", "https://eospublic.cern.ch/eos/opstest/dteam/file.test")
ctx.stat("https://eospublic.cern.ch/eos/opstest/dteam/file.test")Example of copying the file from remote to local (with custom transfer parameters):
import gfal2
ctx = gfal2.creat_context()
params = ctx.transfer_parameters()
params.set_checksum = ("both", "adler32", None)
params.overwrite = True
ctx.filecopy("https://eospublic.cern.ch/eos/opstest/dteam/file.test", "file:///tmp/file.test")
ctx.checksum("file:///tmp/file.test", "adler32")Further code examples can be found in the example/python/ source directory.
Installing the package via pip install gfal2-python will reproduce the compilation
process, hence why you need to make sure you have all the right dependencies.
This guide details the steps needed to get all the dependencies, starting
from a blank machine.
This guide assumes you have the EPEL repositories installed (epel-release package).
In this example, the build platform is Alma9 and we will use v1.12.2,
but the same process applies for other versions or build platforms.
# Clone the gfal2-python repository with the desired version (example for v1.12.2)
$ git clone --branch v1.12.2 https://github.com/cern-fts/gfal2-python.git
$ cd gfal2-python/
# Install standard set of build packages
$ ./ci/fedora-packages.sh
# Build the source RPM and install dependencies
$ cd packaging/
$ make srpm
$ dnf builddep -y gfal2-python-*.src.rpm
# Ready to install now from PyPI
$ pip install gfal2-python- DMC documentation: https://dmc-docs.web.cern.ch/dmc-docs/
- Apache License, version 2.0: https://www.apache.org/licenses/LICENSE-2.0
- Issue tracking: https://github.com/cern-fts/gfal2-python/issues
- Support channels: dmc-support@cern.ch
- Development team contact: dmc-devel@cern.ch
Enjoy using the Gfal2 Python bindings!