What do you need to know about argcomplete in Python?
What do you need to know about argcomplete in Python?
Argcomplete provides easy, extensible command line tab completion of arguments for your Python script. It makes two assumptions: You’re using bash as your shell (limited support for zsh and tcsh is available) You’re using argparse to manage your command line arguments/options.
How does argcomplete get completions in Bash?
Argcomplete gets completions by running your program. It intercepts the execution flow at the moment argcomplete.autocomplete()is called. After sending completions, it exits using exit_method(os._exitby default).
What are the arguments for a callable completer in Python?
Two styles are supported: callable and readline-style. Callable completers are simpler. They are called with the following keyword arguments: prefix: The prefix text of the last word before the cursor on the command line. For dynamic completers, this can be used to reduce the work required to generate possible completions.
Which is the auto completion script in Python?
The command line interface of this program must be additionally implemented in a Python script with argparse and argcomplete and whenever the application is called the registered external argcomplete script is used for auto completion. This option can also be used in combination with the other supported shells.
Is the readline module supported by argcomplete?
The readline module defines a completer protocol in rlcompleter. Readline-style completers are also supported by argcomplete, so you can use the same completer object both in an interactive readline-powered shell and on the bash command line.
Where do I find the argcomplete string in Bash?
In global completion mode, you don’t have to register each argcomplete-capable executable separately. Instead, bash will look for the string PYTHON_ARGCOMPLETE_OK in the first 1024 bytes of any executable that it’s running completion for, and if it’s found, follow the rest of the argcomplete protocol as described above.
When to call the autocomplete method in argcomplete?
argcomplete.autocomplete (parser) This method is the entry point to the module. It must be called after ArgumentParser construction is complete, but before the ArgumentParser.parse_args () method is called.