Autodesk Maya hotkeys with Python

hotkeys.py

import maya.cmds as cmds
import maya.mel as mel
from maya.utils import executeDeferred
from functools import wraps
import re


def defer(fn):
    '''Delays execution of the decorated function until Maya is available.'''
    @wraps(fn)
    def deferred(*args, **kwargs):
        executeDeferred(fn, *args, **kwargs)
    return deferred


def runtime_cmd(name, script, source_type, cat="User"):
    exists = mel.eval("runTimeCommand -exists {0}".format(name))
    if not exists:
        cmd = "runTimeCommand -c (\"{0}\") -cl {1} -cat User {2}".format(
            repr(script).strip("'").strip("\n"), source_type, name)
        print cmd
        mel.eval(cmd)


@defer
def hotkey(name, key_sequence, script, source_type="python",
           release_name="", release_script=None, annotation=None):
    '''A more convenient function for defining maya hotkeys.'''

    #Create nameCommands
    if not annotation:
        annotation = name

    runtime_cmd(name, script, source_type)
    cmds.nameCommand(
        name,
        command=name,
        annotation=annotation,
        stp=source_type)
    if release_script and release_name:
        runtime_cmd(release_name, release_script, source_type)
        cmds.nameCommand(
            release_name,
            command=release_name,
            annotation=annotation,
            stp=source_type)

    #Bind nameCommands to hotkeys
    ctrl = False
    alt = False
    ctrl_match = re.search(r"[Cc]trl\+", key_sequence)
    alt_match = re.search(r"[Aa]lt\+", key_sequence)
    if ctrl_match:
        ctrl = True
        key_sequence = key_sequence.replace(ctrl_match.group(), "")
    if alt_match:
        alt = True
        key_sequence = key_sequence.replace(ctrl_match.group(), "")

    if not release_name:
        cmds.hotkey(
            keyShortcut=key_sequence,
            name=name,
            alt=alt,
            ctl=ctrl)
    else:
        cmds.hotkey(
            keyShortcut=key_sequence,
            name=name,
            alt=alt,
            ctl=ctrl,
            releaseName=release_name)


#Set up our hotkeys
hotline_command = """
import hotline
reload(hotline)
from hotline.contexts import mayactx

hotline.show()
"""
hotkey("HotLineCommand", key_sequence="h", script=hotline_command)