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
|
######################################################################
#
# File: b2/_internal/_utils/python_compat.py
#
# Copyright 2023 Backblaze Inc. All Rights Reserved.
#
# License https://www.backblaze.com/using_b2_code.html
#
######################################################################
"""
Utilities for compatibility with older Python versions.
"""
import functools
import shlex
import sys
if sys.version_info < (3, 9):
def removeprefix(s: str, prefix: str) -> str:
return s[len(prefix):] if s.startswith(prefix) else s
else:
removeprefix = str.removeprefix
if sys.version_info < (3, 8):
class singledispatchmethod:
"""
singledispatchmethod backport for Python 3.7.
There are no guarantees for its completeness.
"""
def __init__(self, method):
self.dispatcher = functools.singledispatch(method)
self.method = method
def register(self, cls, method=None):
return self.dispatcher.register(cls, func=method)
def __get__(self, obj, cls):
@functools.wraps(self.method)
def method_wrapper(arg, *args, **kwargs):
method_desc = self.dispatcher.dispatch(arg.__class__)
return method_desc.__get__(obj, cls)(arg, *args, **kwargs)
method_wrapper.register = self.register
return method_wrapper
def shlex_join(split_command):
return ' '.join(shlex.quote(arg) for arg in split_command)
else:
singledispatchmethod = functools.singledispatchmethod
shlex_join = shlex.join
|
