我们从Python开源项目中，提取了以下10个代码示例，用于说明如何使用bson.regex()。
def object_hook(dct, compile_re=True): if "$oid" in dct: return ObjectId(str(dct["$oid"])) if "$ref" in dct: return DBRef(dct["$ref"], dct["$id"], dct.get("$db", None)) if "$date" in dct: secs = float(dct["$date"]) / 1000.0 return EPOCH_AWARE + datetime.timedelta(seconds=secs) if "$regex" in dct: flags = 0 # PyMongo always adds $options but some other tools may not. for opt in dct.get("$options", ""): flags |= _RE_OPT_TABLE.get(opt, 0) if compile_re: return re.compile(dct["$regex"], flags) else: return Regex(dct["$regex"], flags) if "$minKey" in dct: return MinKey() if "$maxKey" in dct: return MaxKey() if "$binary" in dct: if isinstance(dct["$type"], int): dct["$type"] = "%02x" % dct["$type"] subtype = int(dct["$type"], 16) if subtype >= 0xffffff80: # Handle mongoexport values subtype = int(dct["$type"][6:], 16) return Binary(base64.b64decode(dct["$binary"].encode()), subtype) if "$code" in dct: return Code(dct["$code"], dct.get("$scope")) if bson.has_uuid() and "$uuid" in dct: return bson.uuid.UUID(dct["$uuid"]) return dct
def test_regex(self): for regex_instance in ( re.compile("a*b", re.IGNORECASE), Regex("a*b", re.IGNORECASE)): res = self.round_tripped({"r": regex_instance})["r"] self.assertEqual("a*b", res.pattern) res = self.round_tripped({"r": Regex("a*b", re.IGNORECASE)})["r"] self.assertEqual("a*b", res.pattern) self.assertEqual(re.IGNORECASE, res.flags) unicode_options = re.I | re.M | re.S | re.U | re.X regex = re.compile("a*b", unicode_options) res = self.round_tripped({"r": regex})["r"] self.assertEqual(unicode_options, res.flags) # Some tools may not add $options if no flags are set. res = bsonjs_loads('{"r": {"$regex": "a*b"}}')['r'] self.assertEqual(0, res.flags) self.assertEqual( Regex(".*", "ilm"), bsonjs_loads( '{"r": {"$regex": ".*", "$options": "ilm"}}')['r']) # Order should be $regex then $options self.assertEqual( '{ "regex" : { "$regex" : ".*", "$options" : "mx" } }', bsonjs_dumps({"regex": Regex(".*", re.M | re.X)})) self.assertEqual( '{ "regex" : { "$regex" : ".*", "$options" : "mx" } }', bsonjs_dumps({"regex": re.compile(b".*", re.M | re.X)}))
def default(obj): # We preserve key order when rendering SON, DBRef, etc. as JSON by # returning a SON for those types instead of a dict. This works with # the "json" standard library in Python 2.6+ and with simplejson # 2.1.0+ in Python 2.5+, because those libraries iterate the SON # using PyIter_Next. Python 2.4 must use simplejson 2.0.9 or older, # and those versions of simplejson use the lower-level PyDict_Next, # which bypasses SON's order-preserving iteration, so we lose key # order in Python 2.4. if isinstance(obj, ObjectId): return {"$oid": str(obj)} if isinstance(obj, DBRef): return _json_convert(obj.as_doc()) if isinstance(obj, datetime.datetime): # TODO share this code w/ bson.py? if obj.utcoffset() is not None: obj = obj - obj.utcoffset() millis = int(calendar.timegm(obj.timetuple()) * 1000 + obj.microsecond / 1000) return {"$date": millis} if isinstance(obj, (RE_TYPE, Regex)): flags = "" if obj.flags & re.IGNORECASE: flags += "i" if obj.flags & re.LOCALE: flags += "l" if obj.flags & re.MULTILINE: flags += "m" if obj.flags & re.DOTALL: flags += "s" if obj.flags & re.UNICODE: flags += "u" if obj.flags & re.VERBOSE: flags += "x" if isinstance(obj.pattern, unicode): pattern = obj.pattern else: pattern = obj.pattern.decode('utf-8') return SON([("$regex", pattern), ("$options", flags)]) if isinstance(obj, MinKey): return {"$minKey": 1} if isinstance(obj, MaxKey): return {"$maxKey": 1} if isinstance(obj, Timestamp): return SON([("t", obj.time), ("i", obj.inc)]) if isinstance(obj, Code): return SON([('$code', str(obj)), ('$scope', obj.scope)]) if isinstance(obj, Binary): return SON([ ('$binary', base64.b64encode(obj).decode()), ('$type', "%02x" % obj.subtype)]) if PY3 and isinstance(obj, binary_type): return SON([ ('$binary', base64.b64encode(obj).decode()), ('$type', "00")]) if bson.has_uuid() and isinstance(obj, bson.uuid.UUID): return {"$uuid": obj.hex} raise TypeError("%r is not JSON serializable" % obj)
