diff options
Diffstat (limited to 'bitbake/lib/bb/COW.py')
| -rw-r--r-- | bitbake/lib/bb/COW.py | 171 |
1 files changed, 88 insertions, 83 deletions
diff --git a/bitbake/lib/bb/COW.py b/bitbake/lib/bb/COW.py index ca206cf4b..6917ec378 100644 --- a/bitbake/lib/bb/COW.py +++ b/bitbake/lib/bb/COW.py @@ -3,7 +3,7 @@ # # This is a copy on write dictionary and set which abuses classes to try and be nice and fast. # -# Copyright (C) 2006 Tim Amsell +# Copyright (C) 2006 Tim Amsell # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 as @@ -18,29 +18,31 @@ # with this program; if not, write to the Free Software Foundation, Inc., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # -#Please Note: +#Please Note: # Be careful when using mutable types (ie Dict and Lists) - operations involving these are SLOW. # Assign a file to __warn__ to get warnings about slow operations. # +from __future__ import print_function import copy import types -types.ImmutableTypes = tuple([ \ - types.BooleanType, \ - types.ComplexType, \ - types.FloatType, \ - types.IntType, \ - types.LongType, \ - types.NoneType, \ - types.TupleType, \ - frozenset] + \ - list(types.StringTypes)) +ImmutableTypes = ( + types.NoneType, + bool, + complex, + float, + int, + long, + tuple, + frozenset, + basestring +) MUTABLE = "__mutable__" class COWMeta(type): pass - + class COWDictMeta(COWMeta): __warn__ = False __hasmutable__ = False @@ -59,12 +61,12 @@ class COWDictMeta(COWMeta): __call__ = cow def __setitem__(cls, key, value): - if not isinstance(value, types.ImmutableTypes): + if not isinstance(value, ImmutableTypes): if not isinstance(value, COWMeta): cls.__hasmutable__ = True key += MUTABLE setattr(cls, key, value) - + def __getmutable__(cls, key, readonly=False): nkey = key + MUTABLE try: @@ -77,10 +79,10 @@ class COWDictMeta(COWMeta): return value if not cls.__warn__ is False and not isinstance(value, COWMeta): - print >> cls.__warn__, "Warning: Doing a copy because %s is a mutable type." % key + print("Warning: Doing a copy because %s is a mutable type." % key, file=cls.__warn__) try: value = value.copy() - except AttributeError, e: + except AttributeError as e: value = copy.copy(value) setattr(cls, nkey, value) return value @@ -98,13 +100,13 @@ class COWDictMeta(COWMeta): value = getattr(cls, key) except AttributeError: value = cls.__getmutable__(key, readonly) - - # This is for values which have been deleted + + # This is for values which have been deleted if value is cls.__marker__: raise AttributeError("key %s does not exist." % key) return value - except AttributeError, e: + except AttributeError as e: if not default is cls.__getmarker__: return default @@ -118,6 +120,9 @@ class COWDictMeta(COWMeta): key += MUTABLE delattr(cls, key) + def __contains__(cls, key): + return cls.has_key(key) + def has_key(cls, key): value = cls.__getreadonly__(key, cls.__marker__) if value is cls.__marker__: @@ -127,7 +132,7 @@ class COWDictMeta(COWMeta): def iter(cls, type, readonly=False): for key in dir(cls): if key.startswith("__"): - continue + continue if key.endswith(MUTABLE): key = key[:-len(MUTABLE)] @@ -153,11 +158,11 @@ class COWDictMeta(COWMeta): return cls.iter("keys") def itervalues(cls, readonly=False): if not cls.__warn__ is False and cls.__hasmutable__ and readonly is False: - print >> cls.__warn__, "Warning: If you arn't going to change any of the values call with True." + print("Warning: If you arn't going to change any of the values call with True.", file=cls.__warn__) return cls.iter("values", readonly) def iteritems(cls, readonly=False): if not cls.__warn__ is False and cls.__hasmutable__ and readonly is False: - print >> cls.__warn__, "Warning: If you arn't going to change any of the values call with True." + print("Warning: If you arn't going to change any of the values call with True.", file=cls.__warn__) return cls.iter("items", readonly) class COWSetMeta(COWDictMeta): @@ -176,13 +181,13 @@ class COWSetMeta(COWDictMeta): def remove(cls, value): COWDictMeta.__delitem__(cls, repr(hash(value))) - + def __in__(cls, value): return COWDictMeta.has_key(repr(hash(value))) def iterkeys(cls): raise TypeError("sets don't have keys") - + def iteritems(cls): raise TypeError("sets don't have 'items'") @@ -199,120 +204,120 @@ if __name__ == "__main__": import sys COWDictBase.__warn__ = sys.stderr a = COWDictBase() - print "a", a + print("a", a) a['a'] = 'a' a['b'] = 'b' a['dict'] = {} b = a.copy() - print "b", b + print("b", b) b['c'] = 'b' - print + print() - print "a", a + print("a", a) for x in a.iteritems(): - print x - print "--" - print "b", b + print(x) + print("--") + print("b", b) for x in b.iteritems(): - print x - print + print(x) + print() b['dict']['a'] = 'b' b['a'] = 'c' - print "a", a + print("a", a) for x in a.iteritems(): - print x - print "--" - print "b", b + print(x) + print("--") + print("b", b) for x in b.iteritems(): - print x - print + print(x) + print() try: b['dict2'] - except KeyError, e: - print "Okay!" + except KeyError as e: + print("Okay!") a['set'] = COWSetBase() a['set'].add("o1") a['set'].add("o1") a['set'].add("o2") - print "a", a + print("a", a) for x in a['set'].itervalues(): - print x - print "--" - print "b", b + print(x) + print("--") + print("b", b) for x in b['set'].itervalues(): - print x - print + print(x) + print() b['set'].add('o3') - print "a", a + print("a", a) for x in a['set'].itervalues(): - print x - print "--" - print "b", b + print(x) + print("--") + print("b", b) for x in b['set'].itervalues(): - print x - print + print(x) + print() a['set2'] = set() a['set2'].add("o1") a['set2'].add("o1") a['set2'].add("o2") - print "a", a + print("a", a) for x in a.iteritems(): - print x - print "--" - print "b", b + print(x) + print("--") + print("b", b) for x in b.iteritems(readonly=True): - print x - print + print(x) + print() del b['b'] try: - print b['b'] + print(b['b']) except KeyError: - print "Yay! deleted key raises error" + print("Yay! deleted key raises error") if b.has_key('b'): - print "Boo!" + print("Boo!") else: - print "Yay - has_key with delete works!" - - print "a", a + print("Yay - has_key with delete works!") + + print("a", a) for x in a.iteritems(): - print x - print "--" - print "b", b + print(x) + print("--") + print("b", b) for x in b.iteritems(readonly=True): - print x - print + print(x) + print() b.__revertitem__('b') - print "a", a + print("a", a) for x in a.iteritems(): - print x - print "--" - print "b", b + print(x) + print("--") + print("b", b) for x in b.iteritems(readonly=True): - print x - print + print(x) + print() b.__revertitem__('dict') - print "a", a + print("a", a) for x in a.iteritems(): - print x - print "--" - print "b", b + print(x) + print("--") + print("b", b) for x in b.iteritems(readonly=True): - print x - print + print(x) + print() |