Hi,
I have a weird encoding trouble using biplist and spend many days to reproduce the problem, here's the test code:

#!/usr/bin/env python
# -*- coding: utf-8 -*

import biplist
import unittest

class TestEncoding(unittest.TestCase):

  def test_encoding(self):
    en = { 'key': 'ON' } # 'ON' => '\x4f\x4e'
    zh = { 'key': u'低' } # '低' => '\u4f4e'

    # Comment the following line, then test succeed.
    biplist.writePlistToString(en)

    zh_plist = biplist.writePlistToString(zh)
    zh2 = biplist.readPlistFromString(zh_plist)
    self.assertDictEqual(zh, zh2)

test case failed if writePlist twice. If I comment biplist.writePlistToString(en), it will success. If I change 'ON' or u'低' to other word, it also success.

I'm having trouble with the following data; when trying to parse it with biplist I get the error 'InvalidPlistException: Encountered integer longer than 16 bytes.'

I don't think the data is bad (it works in the program that generated it) so I'm wondering if there's a problem in the way biplist handles it?

bplist00\xd4\x01\x02\x03\x04\x05}~\x7fX$objectsY$archiverX$versionT$top\xaf\x10\x13\x06\x07\x16\x1b"'.3:?FKRW^cjovU$null\xd3\x08\t\n\x0b\x10\x15WNS.keysZNS.objectsV$class\xa4\x0c\r\x0e\x0f\x80\x02\x80\x04\x80\x06\x80\x08\xa4\x11\x12\x13\x14\x80\n\x80\x0c\x80\x0e\x80\x10\x80\x12\xd2\x17\x18\x19\x1aYNS.stringV$classXfullname\x80\x03\xd2\x1c\x1d\x1e!X$classesZ$classname\xa2\x1f

XNSStringXNSObjectXNSString\xd2#$%&YNS.stringV$classWaddress\x80\x05\xd2()*-X$classesZ$classname\xa2+,XNSStringXNSObjectXNSString\xd2/012YNS.stringV$classUphone\x80\x07\xd24569X$classesZ$classname\xa278XNSStringXNSObjectXNSString\xd2;<=>YNS.stringV$classUemail\x80\t\xd2@ABEX$classesZ$classname\xa2CDXNSStringXNSObjectXNSString\xd2GHIJYNS.stringV$class[Test Client\x80\x0b\xd2LMNQX$classesZ$classname\xa2OPXNSStringXNSObjectXNSString\xd2STUVYNS.stringV$class^123 ABC Street\x80\r\xd2XYZ]X$classesZ$classname\xa2[\XNSStringXNSObjectXNSString\xd2_`abYNS.stringV$classT1234\x80\x0f\xd2defiX$classesZ$classname\xa2ghXNSStringXNSObjectXNSString\xd2klmnYNS.stringV$class][email protected]\x80\x11\xd2pqruX$classesZ$classname\xa2stXNSStringXNSObjectXNSString\xd2wxy|X$classesZ$classname\xa2z{\NSDictionaryXNSObject\NSDictionary_\x10\x0fNSKeyedArchiver\x12\x00\x01\x86\xa0\xd1\x80\x81Troot\x80\x01\x00\x08\x00\x11\x00\x1a\x00$\x00-\x002\x00H\x00N\x00U\x00]\x00h\x00o\x00t\x00v\x00x\x00z\x00|\x00\x81\x00\x83\x00\x85\x00\x87\x00\x89\x00\x8b\x00\x90\x00\x9a\x00\xa1\x00\xaa\x00\xac\x00\xb1\x00\xba\x00\xc5\x00\xc8\x00\xd1\x00\xda\x00\xe3\x00\xe8\x00\xf2\x00\xf9\x01\x01\x01\x03\x01\x08\x01\x11\x01\x1c\x01\x1f\x01(\x011\x01:\x01?\x01I\x01P\x01V\x01X\x01]\x01f\x01q\x01t\x01}\x01\x86\x01\x8f\x01\x94\x01\x9e\x01\xa5\x01\xab\x01\xad\x01\xb2\x01\xbb\x01\xc6\x01\xc9\x01\xd2\x01\xdb\x01\xe4\x01\xe9\x01\xf3\x01\xfa\x02\x06\x02\x08\x02\r\x02\x16\x02!\x02$\x02-\x026\x02?\x02D\x02N\x02U\x02d\x02f\x02k\x02t\x02\x7f\x02\x82\x02\x8b\x02\x94\x02\x9d\x02\xa2\x02\xac\x02\xb3\x02\xb8\x02\xba\x02\xbf\x02\xc8\x02\xd3\x02\xd6\x02\xdf\x02\xe8\x02\xf1\x02\xf6\x03\x00\x03\x07\x03\x15\x03\x17\x03\x1c\x03%\x030\x033\x03<\x03E\x03N\x03S\x03\\x03g\x03j\x03w\x03\x80\x03\x8d\x03\x9f\x03\xa4\x03\xa7\x03\xac\x00\x00\x00\x00\x00\x00\x02\x01\x00\x00\x00\x00\x00\x00\x00\x82\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\xae

I'm noticing confusion in how Uids are being handled, when a plist is going to contain both UIds and Ints. Example:

# int to Uid
a = {'$archiver': 'NSKeyedArchiver',
 '$objects': ['$null',
  {'$class': Uid(3), 'somekey': Uid(2), 'someOtherKey': 3},
  'object value as string',
  {'$classes': ['Archived', 'NSObject'], '$classname': 'Archived'}],
 '$top': {'root': Uid(1)},
 '$version': 100000}

biplist.readPlistFromString(biplist.writePlistToString(a))

{'$archiver': 'NSKeyedArchiver',
 '$objects': ['$null',
  {'$class': Uid(3), 

'someOtherKey': Uid(3), 

'somekey': Uid(2)},
  'object value as string',
  {'$classes': ['Archived', 'NSObject'], '$classname': 'Archived'}],
 '$top': {'root': Uid(1)},
 '$version': 100000}

# Uid to int

a = {'$archiver': 'NSKeyedArchiver',
 '$objects': ['$null',
  {'$class': 1, 'somekey': 2},
  'object value as string',
  {'$classes': ['Archived', 'NSObject'], '$classname': 'Archived'}],
 '$top': {'root': Uid(1)},
 '$version': 100000}

biplist.readPlistFromString(biplist.writePlistToString(a))

{'$archiver': 'NSKeyedArchiver',
 '$objects': ['$null',
  {'$class': 1, 'somekey': 2},
  'object value as string',
  {'$classes': ['Archived', 'NSObject'], '$classname': 'Archived'}],

 '$top': {'root': 1},

 '$version': 100000}

OS X 10.11
Python 2.7.10 (default, Oct 23 2015, 18:05:06) 
IPython 4.0.0 -- An enhanced Interactive Python.

Hello, Wooster! it appear some problem when run python3

module 'plistlib' has no attribute 'Data'

how can I resolve it?

thank you and waiting for your reply

The biplist 0.9 release shows the failure...

======================================================================
ERROR: testLargeDates (test_valid.TestValidPlistFile)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/sw/src/fink.build/biplist-py34-0.9-1/biplist-0.9/tests/test_valid.py", line 72, in testLargeDates
    self.assertEqual(result['lastShownRatePromptDate'], datetime.datetime(1, 12, 30, 0, 0, 0))
KeyError: 'lastShownRatePromptDate'

when built against python 3.4.2, coverage 3.7.1, pytest 2.6.1 and six 1.8.0 on x86_64-apple-darwin14.

Writing this because of gentoo/guru@5fe6976

Source compiled.

• python3_3: running distutils-r1_run_phase python_test
  ....F...........................

  FAIL: testFileRead (test_valid.TestValidPlistFile)

  Traceback (most recent call last):
  File "/mnt/gen2/TmpDir/portage/dev-python/biplist-0.5-r1/work/biplist-0.5/tests/test_valid.py", line 26, in testFileRead
  self.validateSimpleBinaryRoot(result)
  File "/mnt/gen2/TmpDir/portage/dev-python/biplist-0.5-r1/work/biplist-0.5/tests/test_valid.py", line 15, in validateSimpleBinaryRoot
  self.assertEquals(root[six.b('dateItem')], datetime.datetime(2010, 8, 19, 22, 27, 30, 385449), "dates not equal" )
  AssertionError: datetime.datetime(2010, 8, 19, 22, 27, 30, 385448) != datetime.datetime(2010, 8, 19, 22, 27, 30, 385449) : dates not equal

Ran 32 tests in 0.138s

FAILED (failures=1)

• ERROR: dev-python/biplist-0.5-r1 failed (test phase):
• Tests failed under python3.3

When I tried to write a plist file, I found that the file encoding always being "latin1". Any solutions for specifying as utf-8?