/usr/lib/python2.7/dist-packages/bson/son.py is in python-bson 2.6.3-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 | # Copyright 2009-2012 10gen, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tools for creating and manipulating SON, the Serialized Ocument Notation.
Regular dictionaries can be used instead of SON objects, but not when the order
of keys is important. A SON object can be used just like a normal Python
dictionary."""
import copy
import re
# This sort of sucks, but seems to be as good as it gets...
# This is essentially the same as re._pattern_type
RE_TYPE = type(re.compile(""))
class SON(dict):
"""SON data.
A subclass of dict that maintains ordering of keys and provides a
few extra niceties for dealing with SON. SON objects can be
converted to and from BSON.
The mapping from Python types to BSON types is as follows:
=================================== ============= ===================
Python Type BSON Type Supported Direction
=================================== ============= ===================
None null both
bool boolean both
int [#int]_ int32 / int64 py -> bson
long int64 both
float number (real) both
string string py -> bson
unicode string both
list array both
dict / `SON` object both
datetime.datetime [#dt]_ [#dt2]_ date both
compiled re regex both
`bson.binary.Binary` binary both
`bson.objectid.ObjectId` oid both
`bson.dbref.DBRef` dbref both
None undefined bson -> py
unicode code bson -> py
`bson.code.Code` code py -> bson
unicode symbol bson -> py
bytes (Python 3) [#bytes]_ binary both
=================================== ============= ===================
Note that to save binary data it must be wrapped as an instance of
`bson.binary.Binary`. Otherwise it will be saved as a BSON string
and retrieved as unicode.
.. [#int] A Python int will be saved as a BSON int32 or BSON int64 depending
on its size. A BSON int32 will always decode to a Python int. In Python 2.x
a BSON int64 will always decode to a Python long. In Python 3.x a BSON
int64 will decode to a Python int since there is no longer a long type.
.. [#dt] datetime.datetime instances will be rounded to the nearest
millisecond when saved
.. [#dt2] all datetime.datetime instances are treated as *naive*. clients
should always use UTC.
.. [#bytes] The bytes type from Python 3.x is encoded as BSON binary with
subtype 0. In Python 3.x it will be decoded back to bytes. In Python 2.x
it will be decoded to an instance of :class:`~bson.binary.Binary` with
subtype 0.
"""
def __init__(self, data=None, **kwargs):
self.__keys = []
dict.__init__(self)
self.update(data)
self.update(kwargs)
def __new__(cls, *args, **kwargs):
instance = super(SON, cls).__new__(cls, *args, **kwargs)
instance.__keys = []
return instance
def __repr__(self):
result = []
for key in self.__keys:
result.append("(%r, %r)" % (key, self[key]))
return "SON([%s])" % ", ".join(result)
def __setitem__(self, key, value):
if key not in self:
self.__keys.append(key)
dict.__setitem__(self, key, value)
def __delitem__(self, key):
self.__keys.remove(key)
dict.__delitem__(self, key)
def keys(self):
return list(self.__keys)
def copy(self):
other = SON()
other.update(self)
return other
# TODO this is all from UserDict.DictMixin. it could probably be made more
# efficient.
# second level definitions support higher levels
def __iter__(self):
for k in self.keys():
yield k
def has_key(self, key):
return key in self.keys()
def __contains__(self, key):
return key in self.keys()
# third level takes advantage of second level definitions
def iteritems(self):
for k in self:
yield (k, self[k])
def iterkeys(self):
return self.__iter__()
# fourth level uses definitions from lower levels
def itervalues(self):
for _, v in self.iteritems():
yield v
def values(self):
return [v for _, v in self.iteritems()]
def items(self):
return [(key, self[key]) for key in self]
def clear(self):
for key in self.keys():
del self[key]
def setdefault(self, key, default=None):
try:
return self[key]
except KeyError:
self[key] = default
return default
def pop(self, key, *args):
if len(args) > 1:
raise TypeError("pop expected at most 2 arguments, got "\
+ repr(1 + len(args)))
try:
value = self[key]
except KeyError:
if args:
return args[0]
raise
del self[key]
return value
def popitem(self):
try:
k, v = self.iteritems().next()
except StopIteration:
raise KeyError('container is empty')
del self[k]
return (k, v)
def update(self, other=None, **kwargs):
# Make progressively weaker assumptions about "other"
if other is None:
pass
elif hasattr(other, 'iteritems'): # iteritems saves memory and lookups
for k, v in other.iteritems():
self[k] = v
elif hasattr(other, 'keys'):
for k in other.keys():
self[k] = other[k]
else:
for k, v in other:
self[k] = v
if kwargs:
self.update(kwargs)
def get(self, key, default=None):
try:
return self[key]
except KeyError:
return default
def __eq__(self, other):
"""Comparison to another SON is order-sensitive while comparison to a
regular dictionary is order-insensitive.
"""
if isinstance(other, SON):
return len(self) == len(other) and self.items() == other.items()
return self.to_dict() == other
def __ne__(self, other):
return not self == other
def __len__(self):
return len(self.keys())
def to_dict(self):
"""Convert a SON document to a normal Python dictionary instance.
This is trickier than just *dict(...)* because it needs to be
recursive.
"""
def transform_value(value):
if isinstance(value, list):
return [transform_value(v) for v in value]
if isinstance(value, SON):
value = dict(value)
if isinstance(value, dict):
for k, v in value.iteritems():
value[k] = transform_value(v)
return value
return transform_value(dict(self))
def __deepcopy__(self, memo):
out = SON()
val_id = id(self)
if val_id in memo:
return memo.get(val_id)
memo[val_id] = out
for k, v in self.iteritems():
if not isinstance(v, RE_TYPE):
v = copy.deepcopy(v, memo)
out[k] = v
return out
|