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699
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1 #!/usr/bin/env python
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2 # -*- coding: utf-8 -*-
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3
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4 """
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5 slice a arbitrarily sized list
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6 """
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7
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8 # imports
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9 import argparse
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10 import os
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11 import subprocess
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12 import sys
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13
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700
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14 __all__ = ['slice', 'main', 'Parser']
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699
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15
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16 def slice(container, n_chunks):
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700
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17 size = int(len(container)/(n_chunks-1))
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18 retval = []
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19 start = 0
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20 for i in range(n_chunks-1):
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21 retval.append(container[start:start+size])
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22 start += size
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23 retval.append(container[start:])
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24 return retval
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699
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25
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26 class Parser(argparse.ArgumentParser):
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27 """CLI option parser"""
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28 def __init__(self, **kwargs):
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29 kwargs.setdefault('description', __doc__)
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30 argparse.ArgumentParser.__init__(self, **kwargs)
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31 self.add_argument('N', type=int,
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32 help="number of chunks")
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700
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33 self.add_argument('-M', '--len', dest='length', type=int, default=29,
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34 help="length of list [DEFAULT: %(default)s]")
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699
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35 self.options = None
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36
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37 def parse_args(self, *args, **kw):
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38 options = argparse.ArgumentParser.parse_args(self, *args, **kw)
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39 self.validate(options)
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40 self.options = options
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41 return options
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42
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43 def validate(self, options):
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44 """validate options"""
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45
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46 def main(args=sys.argv[1:]):
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47 """CLI"""
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48
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49 # parse command line options
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50 parser = Parser()
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51 options = parser.parse_args(args)
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52
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700
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53 # generate list
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54 seq = range(options.length)
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55
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56 # chunk list
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57 output = slice(seq, options.N)
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58
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59 # print output
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60 for chunk in output:
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61 print (",".join([str(i) for i in chunk]))
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62
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699
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63 if __name__ == '__main__':
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64 main()
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65
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