将python对象序列化成php能读取的格式(即能反序列化到对象)

转载自：http://my.oschina.net/zuoan001/blog/94914

代码如下：

#coding:utf-8
# vim: encoding=utf-8:ft=python:et:sw=4:ts=8:sts=4:
#
# Copyright (c) 2005 Scott Hurring.
# Licensed under the GPL (undefined version).

import types, string

"""
Serialize class for the PHP serialization format.

@version v0.4 BETA
@author Scott Hurring; scott at hurring dot com
@copyright Copyright (c) 2005 Scott Hurring
@license http://opensource.org/licenses/gpl-license.php GNU Public License
$Id: PHPSerialize.py,v 1.1 2006/01/08 21:53:19 shurring Exp $

Most recent version can be found at:
http://hurring.com/code/python/phpserialize/

Usage:
# Create an instance of the serialize engine
s = PHPSerialize()
# serialize some python data into a string
serialized_string = s.serialize(string)
# encode a session list (php's session_encode)
serialized_string = s.session_encode(list)
"""

class PHPSerialize(object):
    """
    Class to serialize data using the PHP Serialize format.

    Usage:
    serialized_string = PHPSerialize().serialize(data)
    serialized_string = PHPSerialize().session_encode(list)
    """

    def __init__(self):
        pass

    def session_encode(self, session):
        """Thanks to Ken Restivo for suggesting the addition
        of session_encode
        """
        out = ""
        for (k,v) in session.items():
            out = out + "%s|%s" % (k, self.serialize(v))
        return out

    def serialize(self, data):
        return self.serialize_value(data)

    def is_int(self, data):
        """
        Determine if a string var looks like an integer
        TODO: Make this do what PHP does, instead of a hack
        """
        try:
            int(data)
            return True
        except:
            return False

    def serialize_key(self, data):
        """
        Serialize a key, which follows different rules than when
        serializing values.  Many thanks to Todd DeLuca for pointing
        out that keys are serialized differently than values!

        From http://us2.php.net/manual/en/language.types.array.php
        A key may be either an integer or a string.
        If a key is the standard representation of an integer, it will be
        interpreted as such (i.e. "8" will be interpreted as int 8,
        while "08" will be interpreted as "08").
        Floats in key are truncated to integer.
        """
        # Integer, Long, Float, Boolean => integer
        if type(data) is types.IntType or type(data) is types.LongType \
        or type(data) is types.FloatType or type(data) is types.BooleanType:
            return "i:%s;" % int(data)

        # String => string or String => int (if string looks like int)
        elif type(data) is types.StringType:
            if self.is_int(data):
                return "i:%s;" % int(data)
            else:
                return "s:%i:\"%s\";" % (len(data),  data);

        # None / NULL => empty string
        elif type(data) is types.NoneType:
            return "s:0:\"\";"

        # I dont know how to serialize this
        else:
            raise Exception("Unknown / Unhandled key  type (%s)!" % type(data))

    def serialize_value(self, data):
        """
        Serialize a value.
        """

        # Integer => integer
        if type(data) is types.IntType:
            return "i:%s;" % data

        # Float, Long => double
        elif type(data) is types.FloatType or type(data) is types.LongType:
            return "d:%s;" % data

        # String => string or String => int (if string looks like int)
        # Thanks to Todd DeLuca for noticing that PHP strings that
        # look like integers are serialized as ints by PHP
        elif type(data) is types.StringType:
            if self.is_int(data):
                return "i:%s;" % int(data)
            else:
                return "s:%i:\"%s\";" % (len(data), data);

        # None / NULL
        elif type(data) is types.NoneType:
            return "N;";

        # Tuple and List => array
        # The 'a' array type is the only kind of list supported by PHP.
        # array keys are automagically numbered up from 0
        elif type(data) is types.ListType or type(data) is types.TupleType:
            i = 0
            out = []
            # All arrays must have keys
            for k in data:
                out.append(self.serialize_key(i))
                out.append(self.serialize_value(k))
                i += 1
            return "a:%i:{%s}" % (len(data), "".join(out))

        # Dict => array
        # Dict is the Python analogy of a PHP array
        elif type(data) is types.DictType:
            out = []
            for k in data:
                out.append(self.serialize_key(k))
                out.append(self.serialize_value(data[k]))
            return "a:%i:{%s}" % (len(data), "".join(out))

        # Boolean => bool
        elif type(data) is types.BooleanType:
            return "b:%i;" % (data == 1)

        # I dont know how to serialize this
        else:
            raise Exception("Unknown / Unhandled data type (%s)!" % type(data))

#!/usr/bin/env python2.4
# vim: encoding=utf-8:ft=python:et:sw=4:ts=8:sts=4:
#
# Copyright (c) 2005 Scott Hurring.
# Licensed under the GPL (undefined version).

import types, string, re

"""
Unserialize class for the PHP serialization format.

@version v0.4 BETA
@author Scott Hurring; scott at hurring dot com
@copyright Copyright (c) 2005 Scott Hurring
@license http://opensource.org/licenses/gpl-license.php GNU Public License
$Id: PHPUnserialize.py,v 1.1 2006/01/08 21:53:19 shurring Exp $

Most recent version can be found at:
http://hurring.com/code/python/phpserialize/

Usage:
# Create an instance of the unserialize engine
u = PHPUnserialize()
# unserialize some string into python data
data = u.unserialize(serialized_string)
"""

class PHPUnserialize(object):
    """
    Class to unserialize something from the PHP Serialize format.

    Usage:
    u = PHPUnserialize()
    data = u.unserialize(serialized_string)
    """

    def __init__(self):
        pass

    def session_decode(self, data):
        """Thanks to Ken Restivo for suggesting the addition
        of session_encode
        """
        session = {}
        while len(data) > 0:
            m = re.match('^(\w+)\|', data)
            if m:
                key = m.group(1)
                offset = len(key)+1
                (dtype, dataoffset, value) = self._unserialize(data, offset)
                offset = offset + dataoffset
                data = data[offset:]
                session[key] = value
            else:
                # No more stuff to decode
                return session

        return session

    def unserialize(self, data):
        return self._unserialize(data, 0)[2]

    def _unserialize(self, data, offset=0):
        """
        Find the next token and unserialize it.
        Recurse on array.

        offset = raw offset from start of data

        return (type, offset, value)
        """

        buf = []
        dtype = string.lower(data[offset:offset+1])

        #print "# dtype =", dtype

        # 't:' = 2 chars
        dataoffset = offset + 2
        typeconvert = lambda x : x
        chars = datalength = 0

         # int => Integer
        if dtype == 'i':
            typeconvert = lambda x : int(x)
            (chars, readdata) = self.read_until(data, dataoffset, ';')
            # +1 for end semicolon
            dataoffset += chars + 1

         # bool => Boolean
        elif dtype == 'b':
            typeconvert = lambda x : (int(x) == 1)
            (chars, readdata) = self.read_until(data, dataoffset, ';')
            # +1 for end semicolon
            dataoffset += chars + 1

        # double => Floating Point
        elif dtype == 'd':
            typeconvert = lambda x : float(x)
            (chars, readdata) = self.read_until(data, dataoffset, ';')
            # +1 for end semicolon
            dataoffset += chars + 1

        # n => None
        elif dtype == 'n':
            readdata = None

        # s => String
        elif dtype == 's':
            (chars, stringlength) = self.read_until(data, dataoffset, ':')
            # +2 for colons around length field
            dataoffset += chars + 2

            # +1 for start quote
            (chars, readdata) = self.read_chars(data, dataoffset+1, int(stringlength))
            # +2 for endquote semicolon
            dataoffset += chars + 2

            if chars != int(stringlength) != int(readdata):
                raise Exception("String length mismatch")

        # array => Dict
        # If you originally serialized a Tuple or List, it will
        # be unserialized as a Dict.  PHP doesn't have tuples or lists,
        # only arrays - so everything has to get converted into an array
        # when serializing and the original type of the array is lost
        elif dtype == 'a':
            readdata = {}

            # How many keys does this list have?
            (chars, keys) = self.read_until(data, dataoffset, ':')
            # +2 for colons around length field
            dataoffset += chars + 2

            # Loop through and fetch this number of key/value pairs
            for i in range(0, int(keys)):
                # Read the key
                (ktype, kchars, key) = self._unserialize(data, dataoffset)
                dataoffset += kchars
                #print "Key(%i) = (%s, %i, %s) %i" % (i, ktype, kchars, key, dataoffset)

                # Read value of the key
                (vtype, vchars, value) = self._unserialize(data, dataoffset)
                dataoffset += vchars
                #print "Value(%i) = (%s, %i, %s) %i" % (i, vtype, vchars, value, dataoffset)

                # Set the list element
                readdata[key] = value

                # +1 for end semicolon
            dataoffset += 1
            #chars = int(dataoffset) - start

        # I don't know how to unserialize this
        else:
            raise Exception("Unknown / Unhandled data type (%s)!" % dtype)

        return (dtype, dataoffset-offset, typeconvert(readdata))

    def read_until(self, data, offset, stopchar):
        """
        Read from data[offset] until you encounter some char 'stopchar'.
        """
        buf = []
        char = data[offset:offset+1]
        i = 2
        while char != stopchar:
            # Consumed all the characters and havent found ';'
            if i+offset > len(data):
                raise Exception("Invalid")
            buf.append(char)
            char = data[offset+(i-1):offset+i]
            i += 1

        # (chars_read, data)
        return (len(buf), "".join(buf))

    def read_chars(self, data, offset, length):
        """
        Read 'length' number of chars from data[offset].
        """
        buf = []
        # Account for the starting quote char
        #offset += 1
        for i in range(0, length):
            char = data[offset+(i-1):offset+i]
            buf.append(char)

        # (chars_read, data)
        return (len(buf), "".join(buf))

def dumps(data, protocol=None):
    return PHPSerialize().serialize(data)

def loads(data):
    return PHPUnserialize().unserialize(data)

完毕