Refactor the copy dispatcher code in copy.py. Simplifies and shortens

the code by grouping common cases together.
This commit is contained in:
Raymond Hettinger 2004-03-08 05:59:33 +00:00
parent 99842b6534
commit f0e3569a28
1 changed files with 15 additions and 33 deletions

View File

@ -97,44 +97,26 @@ def copy(x):
_copy_dispatch = d = {}
def _copy_atomic(x):
def _copy_immutable(x):
return x
d[types.NoneType] = _copy_atomic
d[types.IntType] = _copy_atomic
d[types.LongType] = _copy_atomic
d[types.FloatType] = _copy_atomic
d[types.BooleanType] = _copy_atomic
try:
d[types.ComplexType] = _copy_atomic
except AttributeError:
pass
d[types.StringType] = _copy_atomic
try:
d[types.UnicodeType] = _copy_atomic
except AttributeError:
pass
try:
d[types.CodeType] = _copy_atomic
except AttributeError:
pass
d[types.TypeType] = _copy_atomic
d[types.XRangeType] = _copy_atomic
d[types.ClassType] = _copy_atomic
d[types.BuiltinFunctionType] = _copy_atomic
for t in (types.NoneType, int, long, float, bool, str, tuple,
frozenset, type, xrange, types.ClassType,
types.BuiltinFunctionType):
d[t] = _copy_immutable
for name in ("ComplexType", "UnicodeType", "CodeType"):
t = getattr(types, name, None)
if t is not None:
d[t] = _copy_immutable
def _copy_list(x):
return x[:]
d[types.ListType] = _copy_list
def _copy_with_constructor(x):
return type(x)(x)
for t in (list, dict, set):
d[t] = _copy_with_constructor
def _copy_tuple(x):
return x[:]
d[types.TupleType] = _copy_tuple
def _copy_dict(x):
def _copy_with_copy_method(x):
return x.copy()
d[types.DictionaryType] = _copy_dict
if PyStringMap is not None:
d[PyStringMap] = _copy_dict
d[PyStringMap] = _copy_with_copy_method
def _copy_inst(x):
if hasattr(x, '__copy__'):