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Jim Fulton writes:

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"""
I've attached a long overdue patch to pickle.py to bring it to format
1.3, which is the same as 1.2 except that the binary float format
is supported.  This is done using the new platform-indepent format
features of struct.

This patch also gets rid of the undocumented obsolete Pickler
dump_special method.
"""
This commit is contained in:
Guido van Rossum 1998-10-22 20:15:36 +00:00
parent cf1daad891
commit d370379186
1 changed files with 16 additions and 13 deletions
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29
Lib/pickle.py
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@ -27,10 +27,13 @@
from types import *
from copy_reg import dispatch_table, safe_constructors
import string, marshal, sys
import string
import marshal
import sys
import struct
format_version = "1.2" # File format version we write
compatible_formats = ["1.0", "1.1"] # Old format versions we can read
format_version = "1.3" # File format version we write
compatible_formats = ["1.0", "1.1", "1.2"] # Old format versions we can read
mdumps = marshal.dumps
mloads = marshal.loads
@ -81,6 +84,7 @@
TUPLE = 't'
EMPTY_TUPLE = ')'
SETITEMS = 'u'
BINFLOAT = 'G'
class Pickler:
@ -93,14 +97,6 @@ def dump(self, object):
self.save(object)
self.write(STOP)
def dump_special(self, callable, args, state = None):
if type(args) is not TupleType and args is not None:
raise PicklingError, "Second argument to dump_special " \
"must be a tuple"
self.save_reduce(callable, args, state)
self.write(STOP)
def put(self, i):
if (self.bin):
s = mdumps(i)[1:]
@ -252,8 +248,11 @@ def save_long(self, object):
self.write(LONG + `object` + '\n')
dispatch[LongType] = save_long
def save_float(self, object):
self.write(FLOAT + `object` + '\n')
def save_float(self, object, pack=struct.pack):
if self.bin:
self.write(BINFLOAT + pack('>d', object))
else:
self.write(FLOAT + `object` + '\n')
dispatch[FloatType] = save_float
def save_string(self, object):
@ -552,6 +551,10 @@ def load_float(self):
self.append(string.atof(self.readline()[:-1]))
dispatch[FLOAT] = load_float
def load_binfloat(self, unpack=struct.unpack):
self.append(unpack('>d', self.read(8))[0])
dispatch[BINFLOAT] = load_binfloat
def load_string(self):
self.append(eval(self.readline()[:-1],
{'__builtins__': {}})) # Let's be careful