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    • 기본문법
      Python 2011. 2. 5. 21:53
      흠... 쓸랑가?

      my_list = ["a", "b", "c"]
      for i,name in enumerate(my_list):
          print i, name

      ---

      # -*- coding: ms949 -*-
      print '한글'

      ---

      import re
      for test_string in ['555-1212', 'ILL-EGAL']:
          if re.match(r'^\d{3}-\d{4}$', test_string): # raw string r/ R/
              print test_string, 'is a valid US local phone number'
          else:
              print test_string, 'rejected'

      ---

      #!/usr/bin/env python
      # This program adds up integers in the command line
      import sys
      try:
          total = sum(int(arg) for arg in sys.argv[1:]) # generator expressions, [1:] ???
          print 'sum =', total
      except ValueError:
          print 'Please supply integer arguments'

      ---

      import glob
      glob.glob('*.gif')

      ---

      class Unit(object):
          def __init__(self, init_dir=0):
              self.dir= init_dir
          def setDir(self, dir):
              self.dir = dir
          def getDir(self):
              return self.dir

      unit = Unit(1)

      print unit.getDir()
      unit.setDir(2)
      print unit.getDir()

      ---
      import unittest

      def median(pool):
          copy = sorted(pool)
          size = len(copy)
          if size % 2 == 1:
              return copy[(size-1)/2]
          else:
              return (copy[size/2 - 1] + copy[size/2]) / 2
      class TestMedian(unittest.TestCase):
          def testMedian(self):
              self.failUnlessEqual(median([2,9,9,7,9,2,4,5,8]), 7)
              self.failUnlessEqual(median([2,9,9,7,9,2,4,5]), 6)
              
      if __name__ == '__main__':
          unittest.main();

      ---

      def median(pool):
          '''Statistical median to demonstrate doctest.
          >>> median([2, 9, 9, 7, 9, 2, 4, 5, 8])
          7
          '''
          copy = sorted(pool)
          size = len(copy)
          if size % 2 == 1:
              return copy[(size - 1) / 2]
          else:
              return (copy[size/2 - 1] + copy[size/2]) / 2

      if __name__ == '__main__':
          import doctest
          doctest.testmod()

      ---

      dinner_recipe = '''<html><body><table>
      <tr><th>amt</th><th>unit</th><th>item</th></tr>
      <tr><td>24</td><td>slices</td><td>baguette</td></tr>
      <tr><td>2+</td><td>tbsp</td><td>olive oil</td></tr>
      <tr><td>1</td><td>cup</td><td>tomatoes</td></tr>
      <tr><td>1</td><td>jar</td><td>pesto</td></tr>
      </table></body></html>'''
      # In Python 2.5 or from http://effbot.org/zone/element-index.htm
      import xml.etree.ElementTree as etree
      tree = etree.fromstring(dinner_recipe)
      # For invalid HTML use http://effbot.org/zone/element-soup.htm
      # import ElementSoup, StringIO
      # tree = ElementSoup.parse(StringIO.StringIO(dinner_recipe))
      pantry = set(['olive oil', 'pesto'])
      for ingredient in tree.getiterator('tr'):
          amt, unit, item = ingredient
          if item.tag == "td" and item.text not in pantry:
              print "%s: %s %s" % (item.text, amt.text, unit.text)

      ----

      BOARD_SIZE = 8

      class BailOut(Exception):
          pass
      def validate(queens):
          left = right = col = queens[-1]
          for r in reversed(queens[:-1]):
              left, right = left-1, right+1
              if r in (left, col, right):
                  raise BailOut

      def add_queen(queens):
          for i in range(BOARD_SIZE):
              test_queens = queens + [i]
              try:
                  validate(test_queens)
                  if len(test_queens) == BOARD_SIZE:
                      return test_queens
                  else:
                      return add_queen(test_queens)
              except BailOut:
                  pass
          raise BailOut

      queens = add_queen([])
      print queens
      print "\n".join(". "*q + "Q " + ". "*(BOARD_SIZE-q-1) for q in queens)


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