ipython-7.10.2.tar.gz

Line magics =========== .. magic:: alias Define an alias for a system command. '%alias alias_name cmd' defines 'alias_name' as an alias for 'cmd' Then, typing 'alias_name params' will execute the system command 'cmd params' (from your underlying operating system). Aliases have lower precedence than magic functions and Python normal variables, so if 'foo' is both a Python variable and an alias, the alias can not be executed until 'del foo' removes the Python variable. You can use the %l specifier in an alias definition to represent the whole line when the alias is called. For example:: In [2]: alias bracket echo "Input in brackets: <%l>" In [3]: bracket hello world Input in brackets: <hello world> You can also define aliases with parameters using %s specifiers (one per parameter):: In [1]: alias parts echo first %s second %s In [2]: %parts A B first A second B In [3]: %parts A Incorrect number of arguments: 2 expected. parts is an alias to: 'echo first %s second %s' Note that %l and %s are mutually exclusive. You can only use one or the other in your aliases. Aliases expand Python variables just like system calls using ! or !! do: all expressions prefixed with '$' get expanded. For details of the semantic rules, see PEP-215: http://www.python.org/peps/pep-0215.html. This is the library used by IPython for variable expansion. If you want to access a true shell variable, an extra $ is necessary to prevent its expansion by IPython:: In [6]: alias show echo In [7]: PATH='A Python string' In [8]: show $PATH A Python string In [9]: show $$PATH /usr/local/lf9560/bin:/usr/local/intel/compiler70/ia32/bin:... You can use the alias facility to access all of $PATH. See the %rehashx function, which automatically creates aliases for the contents of your $PATH. If called with no parameters, %alias prints the current alias table for your system. For posix systems, the default aliases are 'cat', 'cp', 'mv', 'rm', 'rmdir', and 'mkdir', and other platform-specific aliases are added. For windows-based systems, the default aliases are 'copy', 'ddir', 'echo', 'ls', 'ldir', 'mkdir', 'ren', and 'rmdir'. You can see the definition of alias by adding a question mark in the end:: In [1]: cat? Repr: <alias cat for 'cat'> .. magic:: alias_magic :: %alias_magic [-l] [-c] [-p PARAMS] name target Create an alias for an existing line or cell magic. Examples :: In [1]: %alias_magic t timeit Created `%t` as an alias for `%timeit`. Created `%%t` as an alias for `%%timeit`. In [2]: %t -n1 pass 1 loops, best of 3: 954 ns per loop In [3]: %%t -n1 ...: pass ...: 1 loops, best of 3: 954 ns per loop In [4]: %alias_magic --cell whereami pwd UsageError: Cell magic function `%%pwd` not found. In [5]: %alias_magic --line whereami pwd Created `%whereami` as an alias for `%pwd`. In [6]: %whereami Out[6]: u'/home/testuser' In [7]: %alias_magic h history "-p -l 30" --line Created `%h` as an alias for `%history -l 30`. positional arguments: name Name of the magic to be created. target Name of the existing line or cell magic. optional arguments: -l, --line Create a line magic alias. -c, --cell Create a cell magic alias. -p PARAMS, --params PARAMS Parameters passed to the magic function. .. magic:: autoawait Allow to change the status of the autoawait option. This allow you to set a specific asynchronous code runner. If no value is passed, print the currently used asynchronous integration and whether it is activated. It can take a number of value evaluated in the following order: - False/false/off deactivate autoawait integration - True/true/on activate autoawait integration using configured default loop - asyncio/curio/trio activate autoawait integration and use integration with said library. - `sync` turn on the pseudo-sync integration (mostly used for `IPython.embed()` which does not run IPython with a real eventloop and deactivate running asynchronous code. Turning on Asynchronous code with the pseudo sync loop is undefined behavior and may lead IPython to crash. If the passed parameter does not match any of the above and is a python identifier, get said object from user namespace and set it as the runner, and activate autoawait. If the object is a fully qualified object name, attempt to import it and set it as the runner, and activate autoawait. The exact behavior of autoawait is experimental and subject to change across version of IPython and Python. .. magic:: autocall Make functions callable without having to type parentheses. Usage: %autocall [mode] The mode can be one of: 0->Off, 1->Smart, 2->Full. If not given, the value is toggled on and off (remembering the previous state). In more detail, these values mean: 0 -> fully disabled 1 -> active, but do not apply if there are no arguments on the line. In this mode, you get:: In [1]: callable Out[1]: <built-in function callable> In [2]: callable 'hello' ------> callable('hello') Out[2]: False 2 -> Active always. Even if no arguments are present, the callable object is called:: In [2]: float ------> float() Out[2]: 0.0 Note that even with autocall off, you can still use '/' at the start of a line to treat the first argument on the command line as a function and add parentheses to it:: In [8]: /str 43 ------> str(43) Out[8]: '43' # all-random (note for auto-testing) .. magic:: automagic Make magic functions callable without having to type the initial %. Without arguments toggles on/off (when off, you must call it as %automagic, of course). With arguments it sets the value, and you can use any of (case insensitive): - on, 1, True: to activate - off, 0, False: to deactivate. Note that magic functions have lowest priority, so if there's a variable whose name collides with that of a magic fn, automagic won't work for that function (you get the variable instead). However, if you delete the variable (del var), the previously shadowed magic function becomes visible to automagic again. .. magic:: bookmark Manage IPython's bookmark system. %bookmark <name> - set bookmark to current dir %bookmark <name> <dir> - set bookmark to <dir> %bookmark -l - list all bookmarks %bookmark -d <name> - remove bookmark %bookmark -r - remove all bookmarks You can later on access a bookmarked folder with:: %cd -b <name> or simply '%cd <name>' if there is no directory called <name> AND there is such a bookmark defined. Your bookmarks persist through IPython sessions, but they are associated with each profile. .. magic:: cd Change the current working directory. This command automatically maintains an internal list of directories you visit during your IPython session, in the variable _dh. The command %dhist shows this history nicely formatted. You can also do 'cd -<tab>' to see directory history conveniently. Usage: cd 'dir': changes to directory 'dir'. cd -: changes to the last visited directory.