File: pyoptical

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pyoptical 0.4-1
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#!/usr/bin/env python
#coding=utf-8
# : vim set filtype=python :

# Copyright (c) 2009-2012 Valentin Haenel <valentin.haenel@gmx.de>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

""" Command line wrapper for the pyoptical module. """

import pyoptical as pyop
from optparse import OptionParser
import sys
import time
from itertools import repeat

if __name__ == "__main__":
    usage = "%prog [-i interval] [-n number ] [-r] com-port"
    version = "%prog " + pyop.__version__
    error_prefix = "pyoptical -- error:"

    parser = OptionParser(usage=usage, version=version)

    parser.add_option("-i", "--interval",
            action="store",
            type="float",
            dest="interval",
            default=0.0,
            help="the measurement interval in ms, default is as fast as possible")
    parser.add_option("-n", "--number",
            action="store",
            type="int",
            dest="number",
            default=None,
            help="number of measurements to make, default is endless")
    parser.add_option("-r", "--robust",
            action="store_true",
            dest="robust",
            default=False,
            help="when encountering an error, try to continue ignoring as many exceptions as possible")

    opts, args = parser.parse_args()
    if len(args) != 1:
        parser.error("wrong number of arguments")
        sys.exit(-1)

    op = pyop.OptiCAL(args[0])

    # this is a hack, either it executes opts.number times, or endlessly
    for i in repeat(None) if opts.number is None else repeat(None, opts.number):
        try:
            print op.read_luminance()
            time.sleep(opts.interval / 1000)
        except pyop.OptiCALException, e:
            sys.stderr.write(error_prefix + str(e) + "\n")
            if opts.robust:
                continue
            else:
                sys.exit(-1)