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8
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1 """
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2 methods and properties supporting
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3 command line interface
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4 """
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5
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6
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7 import argparse
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8 import sys
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9 from .cast import keyvalue
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10
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11
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12 class ConfigurationParser(argparse.ArgumentParser):
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13 """parse arguments with validation"""
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14
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15 def __init__(self, **kwargs):
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16 kwargs.setdefault('formatter_class', argparse.RawTextHelpFormatter)
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17 argparse.ArgumentParser.__init__(self, **kwargs)
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18 self.add_arguments()
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19 self.options = None
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20
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21 def add_arguments(self):
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22 """add arguments"""
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23 # Abstract Base Class
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24
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25 def parse_args(self, args=sys.argv[1:]):
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26 options = argparse.ArgumentParser.parse_args(self, args)
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27 self.options = self.validate(options)
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28 return self.options
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29
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30 def validate(self, options):
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31 """validate options"""
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32 return options
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33
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34 def keyvalue(self, arg):
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35
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36 try:
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37 return keyvalue(arg)
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38 except AssertionError as e:
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39 self.error(str(e))
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