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In this chapter, let us understand how to work with various command line options in IPython.
Invoking IPython Program
You can invoke an IPython program using the following options −
C:python36> ipython [subcommand] [options] [-c cmd | -m mod | file] [--] [arg]
The file option is a Python script with .py extension. If no other option is given, the script is executed and command prompt reappears.
C:python36>ipython hello.py Hello IPython welcome to interactive computing
Subcommands and Parameters
An IPython command accepts the following subcommand options −
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Profile − Create and manage IPython profiles.
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Kernel − Start a kernel without an attached frontend.
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Locate − Print the path to the IPython dir.
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History − Manage the IPython history database.
An IPython profile subcommand accepts the following parameters −
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ipython profile create myprofile − Creates a new profile.
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ipython profile list − Lists all available profiles.
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ipython locate profile myprofile − Locates required profile.
To install new IPython kernel, use the following command −
Ipython kernel –install –name
To print the path to the IPython dir, use the following command −
C:python36>ipython locate myprofile C:Usersacer.ipython
Besides, we know that −
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The history subcommand manages IPython history database.
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The trim option reduces the IPython history database to the last 1000 entries.
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The clear option deletes all entries.
Some of the other important command line options of IPython are listed below −
| Sr.No. | IPython Command & Description |
|---|---|
| 1 |
–automagic Turn on the auto calling of magic commands. |
| 2 |
–pdb Enable auto calling the pdb debugger after every exception. |
| 3 |
–pylab Pre-load matplotlib and numpy for interactive use with the default matplotlib backend. |
| 4 |
–matplotlib Configure matplotlib for interactive use with the default matplotlib backend. |
| 5 |
–gui=options Enable GUI event loop integration with any of (”glut”, ”gtk”, ”gtk2”,”gtk3”, ”osx”, ”pyglet”, ”qt”, ”qt4”, ”qt5”, ”tk”, ”wx”, ”gtk2”, ”qt4”). |
The sample usage of some of the IPython command line options are shown in following table −
| Sr.No. | IPython Command & Description |
|---|---|
| 1 |
ipython –matplotlib enable matplotlib integration |
| 2 |
ipython –matplotlib=qt enable matplotlib integration with qt4 backend |
| 3 |
ipython –profile=myprofile start with profile foo |
| 4 |
ipython profile create myprofile create profile foo w/ default config files |
| 5 |
ipython help profile show the help for the profile subcmd |
| 6 |
ipython locate print the path to the IPython directory |
| 7 |
ipython locate profile myprofile print the path to the directory for profile `myprofile` |
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