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1 =====================================
1 =====================================
2 Introduction to IPython configuration
2 Introduction to IPython configuration
3 =====================================
3 =====================================
4
4
5 .. _setting_config:
5 .. _setting_config:
6
6
7 Setting configurable options
7 Setting configurable options
8 ============================
8 ============================
9
9
10 Many of IPython's classes have configurable attributes (see
10 Many of IPython's classes have configurable attributes (see
11 :doc:`options/index` for the list). These can be
11 :doc:`options/index` for the list). These can be
12 configured in several ways.
12 configured in several ways.
13
13
14 Python config files
14 Python configuration files
15 -------------------
15 --------------------------
16
16
17 To create the blank config files, run::
17 To create the blank configuration files, run::
18
18
19 ipython profile create [profilename]
19 ipython profile create [profilename]
20
20
21 If you leave out the profile name, the files will be created for the
21 If you leave out the profile name, the files will be created for the
22 ``default`` profile (see :ref:`profiles`). These will typically be located in
22 ``default`` profile (see :ref:`profiles`). These will typically be located in
23 :file:`~/.ipython/profile_default/`, and will be named
23 :file:`~/.ipython/profile_default/`, and will be named
24 :file:`ipython_config.py`, for hitorical reasons you may also find fiels
24 :file:`ipython_config.py`, for historical reasons you may also find files
25 named with IPytho nprefix instead of Jupyter:
25 named with IPython prefix instead of Jupyter:
26 :file:`ipython_notebook_config.py`, etc. The settings in
26 :file:`ipython_notebook_config.py`, etc. The settings in
27 :file:`ipython_config.py` apply to all IPython commands.
27 :file:`ipython_config.py` apply to all IPython commands.
28
28
29 by default, configuration files are fully featured Python scripts that can
29 By default, configuration files are fully featured Python scripts that can
30 execute arbitrary code, the main usage is to set value on the config object
30 execute arbitrary code, the main usage is to set value on the configuration
31 ``c`` which exist in your configuration file.
31 object ``c`` which exist in your configuration file.
32
32
33 You can then configure class attributes like this::
33 You can then configure class attributes like this::
34
34
35 c.InteractiveShell.automagic = False
35 c.InteractiveShell.automagic = False
36
36
37 Be careful with spelling--incorrect names will simply be ignored, with
37 Be careful with spelling--incorrect names will simply be ignored, with
38 no error.
38 no error.
39
39
40 To add to a collection which may have already been defined elsewhere or have
40 To add to a collection which may have already been defined elsewhere or have
41 default values, you can use methods like those found on lists, dicts and
41 default values, you can use methods like those found on lists, dicts and
42 sets: append, extend, :meth:`~traitlets.config.LazyConfigValue.prepend` (like
42 sets: append, extend, :meth:`~traitlets.config.LazyConfigValue.prepend` (like
43 extend, but at the front), add and update (which works both for dicts and
43 extend, but at the front), add and update (which works both for dicts and
44 sets)::
44 sets)::
45
45
46 c.InteractiveShellApp.extensions.append('Cython')
46 c.InteractiveShellApp.extensions.append('Cython')
47
47
48 .. versionadded:: 2.0
48 .. versionadded:: 2.0
49 list, dict and set methods for config values
49 list, dict and set methods for config values
50
50
51 Example config file
51 Example configuration file
52 ```````````````````
52 ``````````````````````````
53
53
54 ::
54 ::
55
55
56 # sample ipython_config.py
56 # sample ipython_config.py
57
57
58 c.TerminalIPythonApp.display_banner = True
58 c.TerminalIPythonApp.display_banner = True
59 c.InteractiveShellApp.log_level = 20
59 c.InteractiveShellApp.log_level = 20
60 c.InteractiveShellApp.extensions = [
60 c.InteractiveShellApp.extensions = [
61 'myextension'
61 'myextension'
62 ]
62 ]
63 c.InteractiveShellApp.exec_lines = [
63 c.InteractiveShellApp.exec_lines = [
64 'import numpy',
64 'import numpy',
65 'import scipy'
65 'import scipy'
66 ]
66 ]
67 c.InteractiveShellApp.exec_files = [
67 c.InteractiveShellApp.exec_files = [
68 'mycode.py',
68 'mycode.py',
69 'fancy.ipy'
69 'fancy.ipy'
70 ]
70 ]
71 c.InteractiveShell.colors = 'LightBG'
71 c.InteractiveShell.colors = 'LightBG'
72 c.InteractiveShell.confirm_exit = False
72 c.InteractiveShell.confirm_exit = False
73 c.InteractiveShell.editor = 'nano'
73 c.InteractiveShell.editor = 'nano'
74 c.InteractiveShell.xmode = 'Context'
74 c.InteractiveShell.xmode = 'Context'
75
75
76 c.PrefilterManager.multi_line_specials = True
76 c.PrefilterManager.multi_line_specials = True
77
77
78 c.AliasManager.user_aliases = [
78 c.AliasManager.user_aliases = [
79 ('la', 'ls -al')
79 ('la', 'ls -al')
80 ]
80 ]
81
81
82 Json Configuration files
82 JSON Configuration files
83 ------------------------
83 ------------------------
84
84
85 in case where executability of configuration can be problematic, or
85 In case where executability of configuration can be problematic, or
86 configurations need to be modified programatically, IPython also support a
86 configurations need to be modified programmatically, IPython also support a
87 limited set of functionalities via ``.json`` config files.
87 limited set of functionalities via ``.json`` configuration files.
88
88
89 You can defined most of the configuration options via a json object which
89 You can defined most of the configuration options via a json object which
90 hierarchy represent the value you woudl normally set on the ``c`` object of
90 hierarchy represent the value you would normally set on the ``c`` object of
91 ``.py`` configuration files. The following ``ipython_config.json`` file::
91 ``.py`` configuration files. The following ``ipython_config.json`` file::
92
92
93 {
93 {
94 "InteractiveShell": {
94 "InteractiveShell": {
95 "colors": "LightBG",
95 "colors": "LightBG",
96 "editor": "nano"
96 "editor": "nano"
97 },
97 },
98 "InteractiveShellApp": {
98 "InteractiveShellApp": {
99 "extensions": [
99 "extensions": [
100 "myextension"
100 "myextension"
101 ]
101 ]
102 }
102 }
103 }
103 }
104
104
105 Is equivalent to the following ``ipython_config.py``::
105 Is equivalent to the following ``ipython_config.py``::
106
106
107 c.InteractiveShellApp.extensions = [
107 c.InteractiveShellApp.extensions = [
108 'myextension'
108 'myextension'
109 ]
109 ]
110
110
111 c.InteractiveShell.colors = 'LightBG'
111 c.InteractiveShell.colors = 'LightBG'
112 c.InteractiveShell.editor = 'nano'
112 c.InteractiveShell.editor = 'nano'
113
113
114
114
115 Command line arguments
115 Command line arguments
116 ----------------------
116 ----------------------
117
117
118 Every configurable value can be set from the command line, using this
118 Every configurable value can be set from the command line, using this
119 syntax::
119 syntax::
120
120
121 ipython --ClassName.attribute=value
121 ipython --ClassName.attribute=value
122
122
123 Many frequently used options have short aliases and flags, such as
123 Many frequently used options have short aliases and flags, such as
124 ``--matplotlib`` (to integrate with a matplotlib GUI event loop) or
124 ``--matplotlib`` (to integrate with a matplotlib GUI event loop) or
125 ``--pdb`` (automatic post-mortem debugging of exceptions).
125 ``--pdb`` (automatic post-mortem debugging of exceptions).
126
126
127 To see all of these abbreviated options, run::
127 To see all of these abbreviated options, run::
128
128
129 ipython --help
129 ipython --help
130 jupyter notebook --help
130 jupyter notebook --help
131 # etc.
131 # etc.
132
132
133 Options specified at the command line, in either format, override
133 Options specified at the command line, in either format, override
134 options set in a configuration file.
134 options set in a configuration file.
135
135
136 The config magic
136 The config magic
137 ----------------
137 ----------------
138
138
139 You can also modify config from inside IPython, using a magic command::
139 You can also modify config from inside IPython, using a magic command::
140
140
141 %config IPCompleter.greedy = True
141 %config IPCompleter.greedy = True
142
142
143 At present, this only affects the current session - changes you make to
143 At present, this only affects the current session - changes you make to
144 config are not saved anywhere. Also, some options are only read when
144 config are not saved anywhere. Also, some options are only read when
145 IPython starts, so they can't be changed like this.
145 IPython starts, so they can't be changed like this.
146
146
147 .. _configure_start_ipython:
147 .. _configure_start_ipython:
148
148
149 Running IPython from Python
149 Running IPython from Python
150 ----------------------------
150 ----------------------------
151
151
152 If you are using :ref:`embedding` to start IPython from a normal
152 If you are using :ref:`embedding` to start IPython from a normal
153 python file, you can set configuration options the same way as in a
153 python file, you can set configuration options the same way as in a
154 config file by creating a traitlets config object and passing it to
154 config file by creating a traitlets config object and passing it to
155 start_ipython like in the example below.
155 start_ipython like in the example below.
156
156
157 .. literalinclude:: ../../../examples/Embedding/start_ipython_config.py
157 .. literalinclude:: ../../../examples/Embedding/start_ipython_config.py
158 :language: python
158 :language: python
159
159
160 .. _profiles:
160 .. _profiles:
161
161
162 Profiles
162 Profiles
163 ========
163 ========
164
164
165 IPython can use multiple profiles, with separate configuration and
165 IPython can use multiple profiles, with separate configuration and
166 history. By default, if you don't specify a profile, IPython always runs
166 history. By default, if you don't specify a profile, IPython always runs
167 in the ``default`` profile. To use a new profile::
167 in the ``default`` profile. To use a new profile::
168
168
169 ipython profile create foo # create the profile foo
169 ipython profile create foo # create the profile foo
170 ipython --profile=foo # start IPython using the new profile
170 ipython --profile=foo # start IPython using the new profile
171
171
172 Profiles are typically stored in :ref:`ipythondir`, but you can also keep
172 Profiles are typically stored in :ref:`ipythondir`, but you can also keep
173 a profile in the current working directory, for example to distribute it
173 a profile in the current working directory, for example to distribute it
174 with a project. To find a profile directory on the filesystem::
174 with a project. To find a profile directory on the filesystem::
175
175
176 ipython locate profile foo
176 ipython locate profile foo
177
177
178 .. _ipythondir:
178 .. _ipythondir:
179
179
180 The IPython directory
180 The IPython directory
181 =====================
181 =====================
182
182
183 IPython stores its files---config, command history and extensions---in
183 IPython stores its files---config, command history and extensions---in
184 the directory :file:`~/.ipython/` by default.
184 the directory :file:`~/.ipython/` by default.
185
185
186 .. envvar:: IPYTHONDIR
186 .. envvar:: IPYTHONDIR
187
187
188 If set, this environment variable should be the path to a directory,
188 If set, this environment variable should be the path to a directory,
189 which IPython will use for user data. IPython will create it if it
189 which IPython will use for user data. IPython will create it if it
190 does not exist.
190 does not exist.
191
191
192 .. option:: --ipython-dir=<path>
192 .. option:: --ipython-dir=<path>
193
193
194 This command line option can also be used to override the default
194 This command line option can also be used to override the default
195 IPython directory.
195 IPython directory.
196
196
197 To see where IPython is looking for the IPython directory, use the command
197 To see where IPython is looking for the IPython directory, use the command
198 ``ipython locate``, or the Python function :func:`IPython.paths.get_ipython_dir`.
198 ``ipython locate``, or the Python function :func:`IPython.paths.get_ipython_dir`.
199
199
200
200
201 Systemwide configuration
201 Systemwide configuration
202 ========================
202 ========================
203
203
204 It can be usefull to deploy systemwide ipython or ipykernel configuration
204 It can be useful to deploy systemwide ipython or ipykernel configuration
205 when managing environment for many users. At startup time IPython and
205 when managing environment for many users. At startup time IPython and
206 IPykernel will search for configuration file in multiple systemwide
206 IPykernel will search for configuration file in multiple systemwide
207 locations, mainly:
207 locations, mainly:
208
208
209 - ``/etc/ipython/``
209 - ``/etc/ipython/``
210 - ``/usr/local/etc/ipython/``
210 - ``/usr/local/etc/ipython/``
211
211
212 When the global install is a standalone python distribution it may also
212 When the global install is a standalone python distribution it may also
213 search in distribution specific location, for example:
213 search in distribution specific location, for example:
214
214
215 - ``$ANACONDA_LOCATION/etc/ipython/``
215 - ``$ANACONDA_LOCATION/etc/ipython/``
216
216
217 In those locations, Terminal IPython will look for a file called
217 In those locations, Terminal IPython will look for a file called
218 ``ipython_config.py`` and ``ipython_config.json``, ipykernel will look for
218 ``ipython_config.py`` and ``ipython_config.json``, ipykernel will look for
219 ``ipython_kernel_config.py`` and ``ipython_kernel.json``.
219 ``ipython_kernel_config.py`` and ``ipython_kernel.json``.
220
220
221 Configuration files are loaded in order and merged with configuration on
221 Configuration files are loaded in order and merged with configuration on
222 later locatoin taking precedence on earlier locations (that is to say a user
222 later location taking precedence on earlier locations (that is to say a user
223 can overwrite a systemwide configuration option).
223 can overwrite a systemwide configuration option).
224
224
225 You can see all locations in which IPython is looking for configuration files
225 You can see all locations in which IPython is looking for configuration files
226 by starting ipython in debug mode::
226 by starting ipython in debug mode::
227
227
228 $ ipython --debug -c 'exit()'
228 $ ipython --debug -c 'exit()'
229
229
230 Identically with ipykernel though the command is currently blocking until
230 Identically with ipykernel though the command is currently blocking until
231 this process is killed with ``Ctrl-\``::
231 this process is killed with ``Ctrl-\``::
232
232
233 $ python -m ipykernel --debug No newline at end of file
233 $ python -m ipykernel --debug
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