templates/python_pgm_template

#!/usr/bin/env python

r"""
python_pgm_template: Copy this template as a base to get a start on a python
program.  You may remove any generic comments (like this one).
"""

import sys

save_path_0 = sys.path[0]
del sys.path[0]

from gen_arg import *
from gen_print import *
from gen_valid import *

# Restore sys.path[0].
sys.path.insert(0, save_path_0)

parser = argparse.ArgumentParser(
    usage='%(prog)s [OPTIONS]',
    description="%(prog)s will...",
    formatter_class=argparse.ArgumentDefaultsHelpFormatter,
    prefix_chars='-+')

parser.add_argument(
    '--whatever',
    help='bla, bla.')

# Populate stock_list with options we want.
stock_list = [("test_mode", 0), ("quiet", 0), ("debug", 0)]


def exit_function(signal_number=0,
                  frame=None):

    r"""
    Execute whenever the program ends normally or with the signals that we
    catch (i.e. TERM, INT).
    """

    dprint_executing()
    dprint_var(signal_number)

    # Your cleanup code here.

    qprint_pgm_footer()


def signal_handler(signal_number,
                   frame):

    r"""
    Handle signals.  Without a function to catch a SIGTERM or SIGINT, our
    program would terminate immediately with return code 143 and without
    calling our exit_function.
    """

    # Our convention is to set up exit_function with atexit.register() so
    # there is no need to explicitly call exit_function from here.

    dprint_executing()

    # Calling exit prevents us from returning to the code that was running
    # when we received the signal.
    exit(0)


def validate_parms():

    r"""
    Validate program parameters, etc.  Return True or False (i.e. pass/fail)
    accordingly.
    """

    # Your validation code here.

    gen_post_validation(exit_function, signal_handler)

    return True


def main():

    if not gen_get_options(parser, stock_list):
        return False

    if not validate_parms():
        return False

    qprint_pgm_header()

    # Your code here.

    return True


# Main

if not main():
    exit(1)