annotate utils/odict.py @ 2:77641d5731c8

Added tool images.
author devteam <devteam@galaxyproject.org>
date Mon, 14 Apr 2014 09:20:28 -0400
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1 """
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2 Ordered dictionary implementation.
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3 """
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4
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5 from UserDict import UserDict
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6
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7 class odict(UserDict):
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8 """
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9 http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/107747
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10
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11 This dictionary class extends UserDict to record the order in which items are
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12 added. Calling keys(), values(), items(), etc. will return results in this
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13 order.
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14 """
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15 def __init__( self, dict = None ):
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16 self._keys = []
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17 UserDict.__init__( self, dict )
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18
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19 def __delitem__( self, key ):
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20 UserDict.__delitem__( self, key )
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21 self._keys.remove( key )
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22
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23 def __setitem__( self, key, item ):
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24 UserDict.__setitem__( self, key, item )
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25 if key not in self._keys:
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26 self._keys.append( key )
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27
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28 def clear( self ):
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29 UserDict.clear( self )
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30 self._keys = []
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31
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32 def copy(self):
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33 new = odict()
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34 new.update( self )
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35 return new
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36
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37 def items( self ):
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38 return zip( self._keys, self.values() )
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39
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40 def keys( self ):
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41 return self._keys[:]
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42
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43 def popitem( self ):
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44 try:
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45 key = self._keys[-1]
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46 except IndexError:
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47 raise KeyError( 'dictionary is empty' )
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48 val = self[ key ]
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49 del self[ key ]
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50 return ( key, val )
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51
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52 def setdefault( self, key, failobj=None ):
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53 if key not in self._keys:
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54 self._keys.append( key )
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55 return UserDict.setdefault( self, key, failobj )
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56
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57 def update( self, dict ):
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58 for ( key, val ) in dict.items():
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59 self.__setitem__( key, val )
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60
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61 def values( self ):
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62 return map( self.get, self._keys )
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63
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64 def iterkeys( self ):
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65 return iter( self._keys )
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66
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67 def itervalues( self ):
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68 for key in self._keys:
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69 yield self.get( key )
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70
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71 def iteritems( self ):
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72 for key in self._keys:
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73 yield key, self.get( key )
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74
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75 def __iter__( self ):
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76 for key in self._keys:
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77 yield key
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78
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79 def reverse( self ):
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80 self._keys.reverse()
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81
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82 def insert( self, index, key, item ):
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83 if key not in self._keys:
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84 self._keys.insert( index, key )
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85 UserDict.__setitem__( self, key, item )