wong2 / Pick
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pick
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pick is a small python library to help you create curses based interactive selection list in the terminal. See it in action:
.. image:: example/basic.gif?raw=true :alt: Demo
Installation
::
$ pip install pick
Usage
pick comes with a simple api::
>>> from pick import pick
>>> title = 'Please choose your favorite programming language: '
>>> options = ['Java', 'JavaScript', 'Python', 'PHP', 'C++', 'Erlang', 'Haskell']
>>> option, index = pick(options, title)
>>> print(option)
>>> print(index)
outputs::
>>> C++
>>> 4
pick multiselect example::
>>> from pick import pick
>>> title = 'Please choose your favorite programming language (press SPACE to mark, ENTER to continue): '
>>> options = ['Java', 'JavaScript', 'Python', 'PHP', 'C++', 'Erlang', 'Haskell']
>>> selected = pick(options, title, multiselect=True, min_selection_count=1)
>>> print(selected)
outputs::
>>> [('Java', 0), ('C++', 4)]
Options
-
options
: a list of options to choose from -
title
: (optional) a title above options list -
indicator
: (optional) custom the selection indicator, defaults to * -
default_index
: (optional) set this if the default selected option is not the first one -
multiselect
: (optional), if set to True its possible to select multiple items by hitting SPACE -
min_selection_count
: (optional) for multi select feature to dictate a minimum of selected items before continuing -
options_map_func
: (optional) a mapping function to pass each option through before displaying
Register custom handlers
Sometimes you may need to register custom handlers for specific keyboard keys, you can use the register_custom_handler
API::
>>> from pick import Picker
>>> title, options = 'Title', ['Option1', 'Option2']
>>> picker = Picker(options, title)
>>> def go_back(picker):
... return None, -1
>>> picker.register_custom_handler(ord('h'), go_back)
>>> option, index = picker.start()
- the custom handler will be called with the
picker
instance as it's parameter. - the custom handler should either return a two element tuple, or None.
- if None is returned, the picker would continue to run, otherwise the picker will stop and return the tuple.
Options Map Function
If your options are not in a format that you want displayed (such as a dictionary), you can pass in a mapping function which each option will be run through. The return value of the function will be displayed.
- the selected option returned will be the original value and not the displayed return result from the
options_map_func
function.
pick options map function example::
>>> from pick import pick
>>> title = 'Please choose an option: '
>>> options = [{'label': 'option1'}, {'label': 'option2'}, {'label': 'option3'}]
>>> def get_label(option): return option.get('label')
>>> selected = pick(options, title, indicator='*', options_map_func=get_label)
>>> print(selected)
displays::
Please choose an option:
* option1
option2
option3
outputs::
>>> ({ 'label': 'option1' }, 0)