Overview of the IPython configuration system¶
This section describes the IPython configuration system. This is based on
traitlets.config; see that documentation for more information
about the overall architecture.
Configuration file location¶
So where should you put your configuration files? IPython uses “profiles” for configuration, and by default, all profiles will be stored in the so called “IPython directory”. The location of this directory is determined by the following algorithm:
- If the
ipython-dircommand line flag is given, its value is used.
- If not, the value returned by
IPython.paths.get_ipython_dir()is used. This function will first look at the
IPYTHONDIRenvironment variable and then default to
~/.ipython. Historical support for the
IPYTHON_DIRenvironment variable will be removed in a future release.
For most users, the configuration directory will be
Previous versions of IPython on Linux would use the XDG config directory,
~/.config/ipython by default. We have decided to go
~/.ipython for consistency among systems. IPython will
issue a warning if it finds the XDG location, and will move it to the new
location if there isn’t already a directory there.
Once the location of the IPython directory has been determined, you need to know
which profile you are using. For users with a single configuration, this will
simply be ‘default’, and will be located in
The next thing you need to know is what to call your configuration file. The
basic idea is that each application has its own default configuration filename.
The default named used by the ipython command line program is
ipython_config.py, and all IPython applications will use this file.
Other applications, such as the parallel ipcluster scripts or the
QtConsole will load their own config files after
load a particular configuration file instead of the default, the name can be
overridden by the
config_file command line flag.
To generate the default configuration files, do:
$ ipython profile create
and you will have a default
ipython_config.py in your IPython directory
profile_default. If you want the default config files for the
IPython.parallel applications, add
--parallel to the end of the
Locating these files¶
From the command-line, you can quickly locate the IPYTHONDIR or a specific profile with:
$ ipython locate /home/you/.ipython $ ipython locate profile foo /home/you/.ipython/profile_foo
These map to the utility functions:
A profile is a directory containing configuration and runtime files, such as logs, connection info for the parallel apps, and your IPython command history.
The idea is that users often want to maintain a set of configuration files for different purposes: one for doing numerical computing with NumPy and SciPy and another for doing symbolic computing with SymPy. Profiles make it easy to keep a separate configuration files, logs, and histories for each of these purposes.
Let’s start by showing how a profile is used:
$ ipython --profile=sympy
This tells the ipython command line program to get its configuration
from the “sympy” profile. The file names for various profiles do not change. The
only difference is that profiles are named in a special way. In the case above,
the “sympy” profile means looking for
The general pattern is this: simply create a new profile with:
$ ipython profile create <name>
which adds a directory called
profile_<name> to your IPython directory. Then
you can load this profile by adding
--profile=<name> to your command line
options. Profiles are supported by all IPython applications.
IPython ships with some sample profiles in
you create profiles with the name of one of our shipped profiles, these config
files will be copied over instead of starting with the automatically generated
IPython extends the config loader for Python files so that you can inherit config from another profile. To do this, use a line like this in your Python config file: