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| # Copyright 2009-2015 MongoDB, 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. | |
| """Utility functions and definitions for python3 compatibility.""" | |
| import sys | |
| PY3 = sys.version_info[0] == 3 | |
| if PY3: | |
| import codecs | |
| import _thread as thread | |
| from io import BytesIO as StringIO | |
| MAXSIZE = sys.maxsize | |
| imap = map | |
| def b(s): | |
| # BSON and socket operations deal in binary data. In | |
| # python 3 that means instances of `bytes`. In python | |
| # 2.6 and 2.7 you can create an alias for `bytes` using | |
| # the b prefix (e.g. b'foo'). | |
| # See http://python3porting.com/problems.html#nicer-solutions | |
| return codecs.latin_1_encode(s)[0] | |
| def bytes_from_hex(h): | |
| return bytes.fromhex(h) | |
| def iteritems(d): | |
| return iter(d.items()) | |
| def itervalues(d): | |
| return iter(d.values()) | |
| def reraise(exctype, value, trace=None): | |
| raise exctype(str(value)).with_traceback(trace) | |
| def _unicode(s): | |
| return s | |
| text_type = str | |
| string_type = str | |
| integer_types = int | |
| else: | |
| import thread | |
| from itertools import imap | |
| try: | |
| from cStringIO import StringIO | |
| except ImportError: | |
| from StringIO import StringIO | |
| MAXSIZE = sys.maxint | |
| def b(s): | |
| # See comments above. In python 2.x b('foo') is just 'foo'. | |
| return s | |
| def bytes_from_hex(h): | |
| return h.decode('hex') | |
| def iteritems(d): | |
| return d.iteritems() | |
| def itervalues(d): | |
| return d.itervalues() | |
| # "raise x, y, z" raises SyntaxError in Python 3 | |
| exec("""def reraise(exctype, value, trace=None): | |
| raise exctype, str(value), trace | |
| """) | |
| _unicode = unicode | |
| string_type = basestring | |
| text_type = unicode | |
| integer_types = (int, long) | |