units.py

#!/usr/bin/env python
#-*- coding:utf-8 -*-
#
# This file is part of the PyNCulture project, which aims at providing tools to
# easily generate complex neuronal cultures.
# Copyright (C) 2017 SENeC Initiative
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

try:
    import pint

    # check for the registry

    ureg = pint.get_application_registry()

    if ureg == pint._DEFAULT_REGISTRY:
        ureg = pint.UnitRegistry()
        pint.set_application_registry(ureg)

    Q_ = ureg.Quantity

    # length

    m = ureg.meter
    cm = ureg.cm
    mm = ureg.mm
    um = ureg.micrometer

    # time

    day = ureg.day
    hour = ureg.hour
    minute = ureg.min
    second = ureg.second

    # frequency

    cps = ureg.count / ureg.second
    cpm = ureg.count / ureg.minute
    cph = ureg.count / ureg.hour

    # concentration

    M = ureg.mol / ureg.L
    mM = ureg.millimol / ureg.L
    uM = ureg.micromol / ureg.L

    # angles

    rad = ureg.rad
    deg = ureg.deg

    _unit_support = True
except ImportError:
    _unit_support = False