FazBrowse GitHub Viewer
|
Trending
|
URL:
|
Home
Tools:
[Download Repo ZIP]
[Original HTTPS Page]
cpython/Lib/__future__.py at 2.7 · python/cpython · GitHub
Uh oh!
There was an error while loading.
Please reload this page
.
python
/
cpython
Public
Uh oh!
There was an error while loading.
Please reload this page
.
Notifications
You must be signed in to change notification settings
Fork
35.4k
Star
76.8k
Code
Issues
5k+
Pull requests
2.6k
Actions
Projects
Security and quality
0
Insights
Additional navigation options
Code
Issues
Pull requests
Actions
Projects
Security and quality
Insights
Expand file tree
Breadcrumbs
cpython
/
Lib
/
__future__.py
Copy path
More file actions
More file actions
Latest commit
History
History
History
128 lines (95 loc) · 4.28 KB
Breadcrumbs
cpython
/
Lib
/
__future__.py
Copy path
File metadata and controls
128 lines (95 loc) · 4.28 KB
Raw
Copy raw file
Download raw file
Open symbols panel
Edit and raw actions
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
"""Record of phased-in incompatible language changes.
Each line is of the form:
FeatureName = "_Feature(" OptionalRelease "," MandatoryRelease ","
CompilerFlag ")"
where, normally, OptionalRelease < MandatoryRelease, and both are 5-tuples
of the same form as sys.version_info:
(PY_MAJOR_VERSION, # the 2 in 2.1.0a3; an int
PY_MINOR_VERSION, # the 1; an int
PY_MICRO_VERSION, # the 0; an int
PY_RELEASE_LEVEL, # "alpha", "beta", "candidate" or "final"; string
PY_RELEASE_SERIAL # the 3; an int
)
OptionalRelease records the first release in which
from __future__ import FeatureName
was accepted.
In the case of MandatoryReleases that have not yet occurred,
MandatoryRelease predicts the release in which the feature will become part
of the language.
Else MandatoryRelease records when the feature became part of the language;
in releases at or after that, modules no longer need
from __future__ import FeatureName
to use the feature in question, but may continue to use such imports.
MandatoryRelease may also be None, meaning that a planned feature got
dropped.
Instances of class _Feature have two corresponding methods,
.getOptionalRelease() and .getMandatoryRelease().
CompilerFlag is the (bitfield) flag that should be passed in the fourth
argument to the builtin function compile() to enable the feature in
dynamically compiled code. This flag is stored in the .compiler_flag
attribute on _Future instances. These values must match the appropriate
#defines of CO_xxx flags in Include/compile.h.
No feature line is ever to be deleted from this file.
"""
all_feature_names
=
[
"nested_scopes"
,
"generators"
,
"division"
,
"absolute_import"
,
"with_statement"
,
"print_function"
,
"unicode_literals"
,
]
__all__
=
[
"all_feature_names"
]
+
all_feature_names
# The CO_xxx symbols are defined here under the same names used by
# compile.h, so that an editor search will find them here. However,
# they're not exported in __all__, because they don't really belong to
# this module.
CO_NESTED
=
0x0010
# nested_scopes
CO_GENERATOR_ALLOWED
=
0
# generators (obsolete, was 0x1000)
CO_FUTURE_DIVISION
=
0x2000
# division
CO_FUTURE_ABSOLUTE_IMPORT
=
0x4000
# perform absolute imports by default
CO_FUTURE_WITH_STATEMENT
=
0x8000
# with statement
CO_FUTURE_PRINT_FUNCTION
=
0x10000
# print function
CO_FUTURE_UNICODE_LITERALS
=
0x20000
# unicode string literals
class
_Feature
:
def
__init__
(
self
,
optionalRelease
,
mandatoryRelease
,
compiler_flag
):
self
.
optional
=
optionalRelease
self
.
mandatory
=
mandatoryRelease
self
.
compiler_flag
=
compiler_flag
def
getOptionalRelease
(
self
):
"""Return first release in which this feature was recognized.
This is a 5-tuple, of the same form as sys.version_info.
"""
return
self
.
optional
def
getMandatoryRelease
(
self
):
"""Return release in which this feature will become mandatory.
This is a 5-tuple, of the same form as sys.version_info, or, if
the feature was dropped, is None.
"""
return
self
.
mandatory
def
__repr__
(
self
):
return
"_Feature"
+
repr
((
self
.
optional
,
self
.
mandatory
,
self
.
compiler_flag
))
nested_scopes
=
_Feature
((
2
,
1
,
0
,
"beta"
,
1
),
(
2
,
2
,
0
,
"alpha"
,
0
),
CO_NESTED
)
generators
=
_Feature
((
2
,
2
,
0
,
"alpha"
,
1
),
(
2
,
3
,
0
,
"final"
,
0
),
CO_GENERATOR_ALLOWED
)
division
=
_Feature
((
2
,
2
,
0
,
"alpha"
,
2
),
(
3
,
0
,
0
,
"alpha"
,
0
),
CO_FUTURE_DIVISION
)
absolute_import
=
_Feature
((
2
,
5
,
0
,
"alpha"
,
1
),
(
3
,
0
,
0
,
"alpha"
,
0
),
CO_FUTURE_ABSOLUTE_IMPORT
)
with_statement
=
_Feature
((
2
,
5
,
0
,
"alpha"
,
1
),
(
2
,
6
,
0
,
"alpha"
,
0
),
CO_FUTURE_WITH_STATEMENT
)
print_function
=
_Feature
((
2
,
6
,
0
,
"alpha"
,
2
),
(
3
,
0
,
0
,
"alpha"
,
0
),
CO_FUTURE_PRINT_FUNCTION
)
unicode_literals
=
_Feature
((
2
,
6
,
0
,
"alpha"
,
2
),
(
3
,
0
,
0
,
"alpha"
,
0
),
CO_FUTURE_UNICODE_LITERALS
)
Back
|
FazBrowse Home
|
New Git URL