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POPython, how to have separate argument handling and main function?
 

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    <p>If I have two defs like such:</p> <pre><code>def handle_args(argv=None) . . . def main() . . . </code></pre> <p>How can I have the program body consist of:</p> <pre><code>if __name__ == "__main__": handle_args(argv) main() </code></pre> <p>and still allow <code>main</code> to access the arguments, and allow <code>handle_args()</code> to access argv?</p> <p>My current code (Which I haven't tested yet, I know its wrong and I'm still trying to hack it out) is:</p> <p>In file ising.py:</p> <pre><code>import extra,sys global argv def main(argv=None): print('test') if __name__ == "__main__": extra.handle_args(argv) main() sys.exit(main()) </code></pre> <p>In file extra.py:</p> <pre><code>''' ising -- 3D Ising Model Simulator ising is a ising model simulator for three dimensional lattices. It has four built in lattice structures corespodinging to iron, nickel, cobalt and a generic lattice. @author: Joseph "nictrasavios" Harrietha @copyright: 2013 Joseph Harrietha. All rights reserved. @license: GNU GPL3 @contact: nictrasavios@gmail.com ''' import sys,os,argparse __all__ = [] __version__ = 0.1 __date__ = '2013-12-20' __updated__ = '2013-12-20' def handle_args(argv=None): # IGNORE:C0111 '''Command line options.''' if argv is None: argv = sys.argv else: sys.argv.extend(argv) program_name = os.path.basename(sys.argv[0]) program_version = "v%s" % __version__ program_build_date = str(__updated__) program_version_message = '%%(prog)s %s (%s)' % (program_version, program_build_date) program_shortdesc = __import__('__main__').__doc__.split("\n")[1] program_license = '''%s Created by Joseph "nictrasavios" Harrietha on %s. Copyright 2013 Joseph Harrietha. All rights reserved. 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 &lt;http://www.gnu.org/licenses/&gt;. USAGE ''' % (program_shortdesc, str(__date__)) try: # Setup argument parser parser = argparse.ArgumentParser(description=program_license, formatter_class=argparse.RawDescriptionHelpFormatter) parser.add_argument("-v", "--verbose", dest="verbose", action="count", help="set verbosity level [default: %(default)s]") parser.add_argument('-V', '--version', action='version', version=program_version_message) parser.add_argument("-f", "--field", dest="field",default=1, help="Set the value of the magnetic feild. [default: %(default)s]") parser.add_argument("-t", "--temp", dest="temp",default=1, help="Set the value of the temperature in Kelvin. [default: %(default)s]") parser.add_argument("-l", "--side", dest="side",default=1, help="Set the width/height of the square latice. [default: %(default)s]") parser.add_argument("-j", "--excont", dest="excont",default=1, help="Set the value of the Exchange Constant. [default: %(default)s]") parser.add_argument("-d", "--data", dest="data",default=10**3, help="Set the number of points to plot for time evolution. [default: %(default)s]") parser.add_argument("-m", "--steps", dest="steps",default=10**3, help="Sets the number of Monte Carlo steps. [default: %(default)s]") # Process arguments args = parser.parse_args() verbose = args.verbose if verbose &gt; 0: print("Verbose mode on") except KeyboardInterrupt: return 0 except Exception: indent = len(program_name) * " " sys.stderr.write(program_name + ": " + repr(Exception) + "\n") sys.stderr.write(indent + " for help use --help") return 2 </code></pre>
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