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1"""
2requests.compat
3~~~~~~~~~~~~~~~
5This module previously handled import compatibility issues
6between Python 2 and Python 3. It remains for backwards
7compatibility until the next major version.
8"""
10import sys
12# -------
13# urllib3
14# -------
15from pip._vendor.urllib3 import __version__ as urllib3_version
17# Detect which major version of urllib3 is being used.
18try:
19 is_urllib3_1 = int(urllib3_version.split(".")[0]) == 1
20except (TypeError, AttributeError):
21 # If we can't discern a version, prefer old functionality.
22 is_urllib3_1 = True
24# -------------------
25# Character Detection
26# -------------------
29def _resolve_char_detection():
30 """Find supported character detection libraries."""
31 chardet = None
32 return chardet
35chardet = _resolve_char_detection()
37# -------
38# Pythons
39# -------
41# Syntax sugar.
42_ver = sys.version_info
44#: Python 2.x?
45is_py2 = _ver[0] == 2
47#: Python 3.x?
48is_py3 = _ver[0] == 3
50# Note: We've patched out simplejson support in pip because it prevents
51# upgrading simplejson on Windows.
52import json
53from json import JSONDecodeError
55# Keep OrderedDict for backwards compatibility.
56from collections import OrderedDict
57from collections.abc import Callable, Mapping, MutableMapping
58from http import cookiejar as cookielib
59from http.cookies import Morsel
60from io import StringIO
62# --------------
63# Legacy Imports
64# --------------
65from urllib.parse import (
66 quote,
67 quote_plus,
68 unquote,
69 unquote_plus,
70 urldefrag,
71 urlencode,
72 urljoin,
73 urlparse,
74 urlsplit,
75 urlunparse,
76)
77from urllib.request import (
78 getproxies,
79 getproxies_environment,
80 parse_http_list,
81 proxy_bypass,
82 proxy_bypass_environment,
83)
85builtin_str = str
86str = str
87bytes = bytes
88basestring = (str, bytes)
89numeric_types = (int, float)
90integer_types = (int,)