python keyboard backspace_keyboard

keyboard

Take full control of your keyboard with this small Python library. Hook global

events, register hotkeys, simulate key presses and much more.

Features

Global event hook on all keyboards (captures keys regardless of focus).

Listen and send keyboard events.

Works with Windows and Linux (requires sudo), with experimental OS X support (thanks @glitchassassin!).

Pure Python , no C modules to be compiled.

Zero dependencies. Trivial to install and deploy, just copy the files.

Python 2 and 3.

Complex hotkey support (e.g. ctrl+shift+m, ctrl+space) with controllable timeout.

Includes high level API (e.g. record and play, add_abbreviation).

Maps keys as they actually are in your layout, with full internationalization support (e.g. Ctrl+ç).

Events automatically captured in separate thread, doesn't block main program.

Tested and documented.

Doesn't break accented dead keys (I'm looking at you, pyHook).

Mouse support available via project mouse (pip install mouse).

Usage

Install the PyPI package:

pip install keyboard

or clone the repository (no installation required, source files are

sufficient):

git clone https://github.com/boppreh/keyboard

Then check the API docs below to

see what features are available.

Example

import keyboard

keyboard.press_and_release('shift+s, space')

keyboard.write('The quick brown fox jumps over the lazy dog.')

keyboard.add_hotkey('ctrl+shift+a', print, args=('triggered', 'hotkey'))

# Press PAGE UP then PAGE DOWN to type "foobar".

keyboard.add_hotkey('page up, page down', lambda: keyboard.write('foobar'))

# Blocks until you press esc.

keyboard.wait('esc')

# Record events until 'esc' is pressed.

recorded = keyboard.record(until='esc')

# Then replay back at three times the speed.

keyboard.play(recorded, speed_factor=3)

# Type @@ then press space to replace with abbreviation.

keyboard.add_abbreviation('@@', '[e-mail]')

# Block forever, like `while True`.

keyboard.wait()

Known limitations:

Events generated under Windows don't report device id (event.device == None). #21

Media keys on Linux may appear nameless (scan-code only) or not at all. #20

Key suppression/blocking only available on Windows. #22

To avoid depending on X, the Linux parts reads raw device files (/dev/input/input*) but this requires root.

Other applications, such as some games, may register hooks that swallow all key events. In this case keyboard will be unable to report events.

This program makes no attempt to hide itself, so don't use it for keyloggers or online gaming bots. Be responsible.

API

Table of Contents

keyboard. KEY_DOWN

keyboard. KEY_UP

keyboard. KeyboardEvent

keyboard. all_modifiers

keyboard. sided_modifiers

keyboard. is_modifier

keyboard. keytoscan_codes

keyboard. parse_hotkey

keyboard. send (aliases:press_and_release)

keyboard. press

keyboard. release

keyboard. is_pressed

keyboard. call_later

keyboard. hook

keyboard. on_press

keyboard. on_release

keyboard. hook_key

keyboard. onpresskey

keyboard. onreleasekey

keyboard. unhook (aliases:unblock_key, unhook_key, unremap_key)

keyboard. unhook_all

keyboard. block_key

keyboard. remap_key

keyboard. parsehotkeycombinations

keyboard. addhotkey _(aliases:register_hotkey)

keyboard. removehotkey _(aliases:clear_hotkey, unregister_hotkey, unremap_hotkey)

keyboard. unhookallhotkeys (aliases:clear_all_hotkeys, remove_all_hotkeys, unregister_all_hotkeys)

keyboard. remap_hotkey

keyboard. stash_state

keyboard. restore_state

keyboard. restore_modifiers

keyboard. write

keyboard. wait

keyboard. gethotkeyname

keyboard. read_event

keyboard. read_key

keyboard. read_hotkey

keyboard. gettypedstrings

keyboard. start_recording

keyboard. stop_recording

keyboard. record

keyboard. play (aliases:replay)

keyboard. addwordlistener (aliases:register_word_listener)

keyboard. removewordlistener (aliases:remove_abbreviation)

keyboard. addabbreviation _(aliases:register_abbreviation)

keyboard. normalize_name

keyboard. KEY_DOWN

= 'down'

keyboard. KEY_UP

= 'up'

class keyboard. KeyboardEvent

KeyboardEvent. device

KeyboardEvent. event_type

KeyboardEvent. is_keypad

KeyboardEvent. modifiers

KeyboardEvent. name

KeyboardEvent. scan_code

KeyboardEvent. time

KeyboardEvent. tojson (self, ensureascii=False)

keyboard. all_modifiers

= {'alt', 'alt gr', 'ctrl', 'left alt', 'left ctrl', 'left shift', 'left windows', 'right alt', 'right ctrl', 'right shift', 'right windows', 'shift', 'windows'}

keyboard. sided_modifiers

= {'alt', 'ctrl', 'shift', 'windows'}

keyboard. is_modifier (key)

Returns True if key is a scan code or name of a modifier key.

keyboard. keytoscancodes (key, errorif_missing=True)

Returns a list of scan codes associated with this key (name or scan code).

keyboard. parse_hotkey (hotkey)

Parses a user-provided hotkey into nested tuples representing the parsed

structure, with the bottom values being lists of scan codes. Also accepts raw

scan codes, which are then wrapped in the required number of nestings.

Example:

parse_hotkey("alt+shift+a, alt+b, c")

# Keys: ^~^ ^~~~^ ^ ^~^ ^ ^

# Steps: ^~~~~~~~~~^ ^~~~^ ^

# ((alt_codes, shift_codes, a_codes), (alt_codes, b_codes), (c_codes,))

keyboard. send (hotkey, dopress=True, dorelease=True)

Sends OS events that perform the given hotkey hotkey.

hotkey can be either a scan code (e.g. 57 for space), single key (e.g. 'space') or multi-key, multi-step hotkey (e.g. 'alt+F4, enter').

do_press if true then press events are sent. Defaults to True.

do_release if true then release events are sent. Defaults to True.

send( 57)

send('ctrl+alt+del')

send('alt+F4, enter')

send('shift+s')

Note: keys are released in the opposite order they were pressed.

keyboard. press (hotkey)

Presses and holds down a hotkey (see send).

keyboard. release (hotkey)

Releases a hotkey (see send).

keyboard. is_pressed (hotkey)

Returns True if the key is pressed.

is_pressed(57) #-> True

is_pressed('space') #-> True

is_pressed('ctrl+space') #-> True

keyboard. call_later (fn, args=(), delay=0.001)

Calls the provided function in a new thread after waiting some time. Useful

for giving the system some time to process an event, without blocking the

current execution flow.

keyboard. hook (callback, suppress=False, on_remove=)

Installs a global listener on all available keyboards, invoking callback

each time a key is pressed or released.

The event passed to the callback is of type keyboard.KeyboardEvent, with the

following attributes:

name: an Unicode representation of the character (e.g. "&") or description (e.g. "space"). The name is always lower-case.

scan_code: number representing the physical key, e.g. 55.

time: timestamp of the time the event occurred, with as much precision as given by the OS.

Returns the given callback for easier development.

keyboard. on_press (callback, suppress=False)

Invokes callback for every KEY_DOWN event. For details see hook.

keyboard. on_release (callback, suppress=False)

Invokes callback for every KEY_UP event. For details see hook.

keyboard. hook_key (key, callback, suppress=False)

Hooks key up and key down events for a single key. Returns the event handler

created. To remove a hooked key use unhook_key(key) or

unhook_key(handler).

Note: this function shares state with hotkeys, so clear_all_hotkeys affects

it aswell.

keyboard. onpresskey (key, callback, suppress=False)

Invokes callback for KEY_DOWN event related to the given key. For details

see hook.

keyboard. onreleasekey (key, callback, suppress=False)

Invokes callback for KEY_UP event related to the given key. For details see

hook.

keyboard. unhook (remove)

Removes a previously added hook, either by callback or by the return value of

hook.

keyboard. unhook_all ()

Removes all keyboard hooks in use, including hotkeys, abbreviations, word

listeners, recorders and waits.

keyboard. block_key (key)

Suppresses all key events of the given key, regardless of modifiers.

keyboard. remap_key (src, dst)

Whenever the key src is pressed or released, regardless of modifiers, press

or release the hotkey dst instead.

keyboard. parsehotkeycombinations (hotkey)

Parses a user-provided hotkey. Differently from parse_hotkey, instead of

each step being a list of the different scan codes for each key, each step is

a list of all possible combinations of those scan codes.

keyboard. add_hotkey (hotkey, callback, args=(), suppress=False,

timeout=1, triggeronrelease=False)

Invokes a callback every time a hotkey is pressed. The hotkey must be in the

format ctrl+shift+a, s. This would trigger when the user holds ctrl, shift

and "a" at once, releases, and then presses "s". To represent literal commas,

pluses, and spaces, use their names ('comma', 'plus', 'space').

args is an optional list of arguments to passed to the callback during each invocation.

suppress defines if successful triggers should block the keys from being sent to other programs.

timeout is the amount of seconds allowed to pass between key presses.

trigger_on_release if true, the callback is invoked on key release instead of key press.

The event handler function is returned. To remove a hotkey call

remove_hotkey(hotkey) or remove_hotkey(handler). before the hotkey state

is reset.

Note: hotkeys are activated when the last key is pressed , not released.

Note: the callback is executed in a separate thread, asynchronously. For an

example of how to use a callback synchronously, see wait.

Examples:

# Different but equivalent ways to listen for a spacebar key press.

add_hotkey(' ', print, args=['space was pressed'])

add_hotkey('space', print, args=['space was pressed'])

add_hotkey('Space', print, args=['space was pressed'])

# Here 57 represents the keyboard code for spacebar; so you will be

# pressing 'spacebar', not '57' to activate the print function.

add_hotkey(57, print, args=['space was pressed'])

add_hotkey('ctrl+q', quit)

add_hotkey('ctrl+alt+enter, space', some_callback)

keyboard. removehotkey (hotkeyor_callback)

Removes a previously hooked hotkey. Must be called wtih the value returned by

add_hotkey.

keyboard. unhookallhotkeys ()

Removes all keyboard hotkeys in use, including abbreviations, word listeners,

recorders and waits.

keyboard. remap_hotkey (src, dst, suppress=True,

triggeronrelease=False)

Whenever the hotkey src is pressed, suppress it and send dst instead.

Example:

remap('alt+w', 'ctrl+up')

keyboard. stash_state ()

Builds a list of all currently pressed scan codes, releases them and returns

the list. Pairs well with restore_state and restore_modifiers.

keyboard. restorestate (scancodes)

Given a list of scan_codes ensures these keys, and only these keys, are

pressed. Pairs well with stash_state, alternative to restore_modifiers.

keyboard. restoremodifiers (scancodes)

Like restore_state, but only restores modifier keys.

keyboard. write (text, delay=0, restorestateafter=True, exact=None)

Sends artificial keyboard events to the OS, simulating the typing of a given

text. Characters not available on the keyboard are typed as explicit unicode

characters using OS-specific functionality, such as alt+codepoint.

To ensure text integrity, all currently pressed keys are released before the

text is typed, and modifiers are restored afterwards.

delay is the number of seconds to wait between keypresses, defaults to no delay.

restore_state_after can be used to restore the state of pressed keys after the text is typed, i.e. presses the keys that were released at the beginning. Defaults to True.

exact forces typing all characters as explicit unicode (e.g. alt+codepoint or special events). If None, uses platform-specific suggested value.

keyboard. wait (hotkey=None, suppress=False, triggeronrelease=False)

Blocks the program execution until the given hotkey is pressed or, if given no

parameters, blocks forever.

keyboard. gethotkeyname (names=None)

Returns a string representation of hotkey from the given key names, or the

currently pressed keys if not given. This function:

normalizes names;

removes "left" and "right" prefixes;

replaces the "+" key name with "plus" to avoid ambiguity;

puts modifier keys first, in a standardized order;

sort remaining keys;

finally, joins everything with "+".

Example:

get_hotkey_name(['+', 'left ctrl', 'shift'])

# "ctrl+shift+plus"

keyboard. read_event (suppress=False)

Blocks until a keyboard event happens, then returns that event.

keyboard. read_key (suppress=False)

Blocks until a keyboard event happens, then returns that event's name or, if

missing, its scan code.

keyboard. read_hotkey (suppress=True)

Similar to read_key(), but blocks until the user presses and releases a

hotkey (or single key), then returns a string representing the hotkey pressed.

Example:

read_hotkey()

# "ctrl+shift+p"

keyboard. gettypedstrings (events, allow_backspace=True)

Given a sequence of events, tries to deduce what strings were typed. Strings

are separated when a non-textual key is pressed (such as tab or enter).

Characters are converted to uppercase according to shift and capslock status.

If allow_backspace is True, backspaces remove the last character typed.

This function is a generator, so you can pass an infinite stream of events and

convert them to strings in real time.

Note this functions is merely an heuristic. Windows for example keeps per-

process keyboard state such as keyboard layout, and this information is not

available for our hooks.

get_type_strings(record()) #-> ['This is what', 'I recorded', '']

keyboard. startrecording (recordedevents_queue=None)

Starts recording all keyboard events into a global variable, or the given

queue if any. Returns the queue of events and the hooked function.

Use stop_recording() or unhook(hooked_function) to stop.

keyboard. stop_recording ()

Stops the global recording of events and returns a list of the events

captured.

keyboard. record (until='escape', suppress=False,

triggeronrelease=False)

Records all keyboard events from all keyboards until the user presses the

given hotkey. Then returns the list of events recorded, of type

keyboard.KeyboardEvent. Pairs well with play(events).

Note: this is a blocking function. Note: for more details on the keyboard hook

and events see hook.

keyboard. play (events, speed_factor=1.0)

Plays a sequence of recorded events, maintaining the relative time intervals.

If speed_factor is <= 0 then the actions are replayed as fast as the OS

allows. Pairs well with record().

Note: the current keyboard state is cleared at the beginning and restored at

the end of the function.

keyboard. addwordlistener (word, callback, triggers=['space'],

match_suffix=False, timeout=2)

Invokes a callback every time a sequence of characters is typed (e.g. 'pet')

and followed by a trigger key (e.g. space). Modifiers (e.g. alt, ctrl, shift)

are ignored.

word the typed text to be matched. E.g. 'pet'.

callback is an argument-less function to be invoked each time the word is typed.

triggers is the list of keys that will cause a match to be checked. If the user presses some key that is not a character (len>1) and not in triggers, the characters so far will be discarded. By default the trigger is only space.

match_suffix defines if endings of words should also be checked instead of only whole words. E.g. if true, typing 'carpet'+space will trigger the listener for 'pet'. Defaults to false, only whole words are checked.

timeout is the maximum number of seconds between typed characters before the current word is discarded. Defaults to 2 seconds.

Returns the event handler created. To remove a word listener use

remove_word_listener(word) or remove_word_listener(handler).

Note: all actions are performed on key down. Key up events are ignored. Note:

word mathes are case sensitive.

keyboard. removewordlistener (wordorhandler)

Removes a previously registered word listener. Accepts either the word used

during registration (exact string) or the event handler returned by the

add_word_listener or add_abbreviation functions.

keyboard. addabbreviation (sourcetext, replacement_text,

match_suffix=False, timeout=2)

Registers a hotkey that replaces one typed text with another. For example

add_abbreviation('tm', u'™')

Replaces every "tm" followed by a space with a ™ symbol (and no space). The

replacement is done by sending backspace events.

match_suffix defines if endings of words should also be checked instead of only whole words. E.g. if true, typing 'carpet'+space will trigger the listener for 'pet'. Defaults to false, only whole words are checked.

timeout is the maximum number of seconds between typed characters before the current word is discarded. Defaults to 2 seconds.

For more details see add_word_listener.

keyboard. normalize_name (name)

Given a key name (e.g. "LEFT CONTROL"), clean up the string and convert to the

canonical representation (e.g. "left ctrl") if one is known.