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<!DOCTYPE html
>
<
html
lang
="
en
"
data-content_root
="
../../
"
>
<
head
>
<
meta
charset
="
utf-8
"
/>
<
meta
name
="
viewport
"
content
="
width=device-width, initial-scale=1.0
"
/>
<
title
>
core.cache — Source.Python v743 documentation
</
title
>
<
link
rel
="
stylesheet
"
type
="
text/css
"
href
="
../../_static/pygments.css?v=03e43079
"
/>
<
link
rel
="
stylesheet
"
type
="
text/css
"
href
="
../../_static/classic.css?v=2780edc4
"
/>
<
script
src
="
../../_static/documentation_options.js?v=b6beb2eb
"
>
</
script
>
<
script
src
="
../../_static/doctools.js?v=9bcbadda
"
>
</
script
>
<
script
src
="
../../_static/sphinx_highlight.js?v=dc90522c
"
>
</
script
>
<
link
rel
="
icon
"
href
="
../../_static/sp_wiki_favicon.png
"
/>
<
link
rel
="
index
"
title
="
Index
"
href
="
../../genindex.html
"
/>
<
link
rel
="
search
"
title
="
Search
"
href
="
../../search.html
"
/>
</
head
>
<
body
>
<
div
class
="
related
"
role
="
navigation
"
aria-label
="
Related
"
>
<
h3
>
Navigation
</
h3
>
<
ul
>
<
li
class
="
right
"
style
="
margin-right: 10px
"
>
<
a
href
="
../../genindex.html
"
title
="
General Index
"
accesskey
="
I
"
>
index
</
a
>
</
li
>
<
li
class
="
right
"
>
<
a
href
="
../../py-modindex.html
"
title
="
Python Module Index
"
>
modules
</
a
>
|
</
li
>
<
li
class
="
nav-item nav-item-0
"
>
<
a
href
="
../../index.html
"
>
Source.Python v743 documentation
</
a
>
»
</
li
>
<
li
class
="
nav-item nav-item-1
"
>
<
a
href
="
../index.html
"
>
Module code
</
a
>
»
</
li
>
<
li
class
="
nav-item nav-item-2
"
>
<
a
href
="
../core.html
"
accesskey
="
U
"
>
core
</
a
>
»
</
li
>
<
li
class
="
nav-item nav-item-this
"
>
<
a
href
=""
>
core.cache
</
a
>
</
li
>
</
ul
>
</
div
>
<
div
class
="
document
"
>
<
div
class
="
documentwrapper
"
>
<
div
class
="
bodywrapper
"
>
<
div
class
="
body
"
role
="
main
"
>
<
h1
>
Source code for core.cache
</
h1
>
<
div
class
="
highlight
"
>
<
pre
>
<
span
>
</
span
>
<
span
class
="
c1
"
>
# ../core/cache.py
</
span
>
<
span
class
="
sd
"
>
"""Provides caching functionality."""
</
span
>
<
span
class
="
c1
"
>
# =============================================================================
</
span
>
<
span
class
="
c1
"
>
# >> IMPORTS
</
span
>
<
span
class
="
c1
"
>
# =============================================================================
</
span
>
<
span
class
="
c1
"
>
# Python Imports
</
span
>
<
span
class
="
c1
"
>
# FuncTools
</
span
>
<
span
class
="
kn
"
>
from
</
span
>
<
span
class
="
w
"
>
</
span
>
<
span
class
="
nn
"
>
functools
</
span
>
<
span
class
="
w
"
>
</
span
>
<
span
class
="
kn
"
>
import
</
span
>
<
span
class
="
n
"
>
wraps
</
span
>
<
span
class
="
c1
"
>
# Inspect
</
span
>
<
span
class
="
kn
"
>
from
</
span
>
<
span
class
="
w
"
>
</
span
>
<
span
class
="
nn
"
>
inspect
</
span
>
<
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class
="
w
"
>
</
span
>
<
span
class
="
kn
"
>
import
</
span
>
<
span
class
="
n
"
>
isdatadescriptor
</
span
>
<
span
class
="
c1
"
>
# Types
</
span
>
<
span
class
="
kn
"
>
from
</
span
>
<
span
class
="
w
"
>
</
span
>
<
span
class
="
nn
"
>
types
</
span
>
<
span
class
="
w
"
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</
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>
<
span
class
="
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"
>
import
</
span
>
<
span
class
="
n
"
>
MethodType
</
span
>
<
span
class
="
c1
"
>
# =============================================================================
</
span
>
<
span
class
="
c1
"
>
# >> FORWARD IMPORTS
</
span
>
<
span
class
="
c1
"
>
# =============================================================================
</
span
>
<
span
class
="
c1
"
>
# Source.Python Imports
</
span
>
<
span
class
="
c1
"
>
# Core
</
span
>
<
span
class
="
kn
"
>
from
</
span
>
<
span
class
="
w
"
>
</
span
>
<
span
class
="
nn
"
>
_core._cache
</
span
>
<
span
class
="
w
"
>
</
span
>
<
span
class
="
kn
"
>
import
</
span
>
<
span
class
="
n
"
>
CachedProperty
</
span
>
<
span
class
="
c1
"
>
# =============================================================================
</
span
>
<
span
class
="
c1
"
>
# >> ALL DECLARATION
</
span
>
<
span
class
="
c1
"
>
# =============================================================================
</
span
>
<
span
class
="
n
"
>
__all__
</
span
>
<
span
class
="
o
"
>
=
</
span
>
<
span
class
="
p
"
>
[
</
span
>
<
span
class
="
s1
"
>
'CachedProperty'
</
span
>
<
span
class
="
p
"
>
,
</
span
>
<
span
class
="
s1
"
>
'cached_property'
</
span
>
<
span
class
="
p
"
>
,
</
span
>
<
span
class
="
s1
"
>
'cached_result'
</
span
>
<
span
class
="
p
"
>
]
</
span
>
<
span
class
="
c1
"
>
# =============================================================================
</
span
>
<
span
class
="
c1
"
>
# >> FUNCTIONS
</
span
>
<
span
class
="
c1
"
>
# =============================================================================
</
span
>
<
div
class
="
viewcode-block
"
id
="
cached_property
"
>
<
a
class
="
viewcode-back
"
href
="
../../developing/modules/core.cache.html#core.cache.cached_property
"
>
[docs]
</
a
>
<
span
class
="
k
"
>
def
</
span
>
<
span
class
="
w
"
>
</
span
>
<
span
class
="
nf
"
>
cached_property
</
span
>
<
span
class
="
p
"
>
(
</
span
>
<
span
class
="
n
"
>
fget
</
span
>
<
span
class
="
o
"
>
=
</
span
>
<
span
class
="
kc
"
>
None
</
span
>
<
span
class
="
p
"
>
,
</
span
>
<
span
class
="
o
"
>
*
</
span
>
<
span
class
="
n
"
>
args
</
span
>
<
span
class
="
p
"
>
,
</
span
>
<
span
class
="
o
"
>
**
</
span
>
<
span
class
="
n
"
>
kwargs
</
span
>
<
span
class
="
p
"
>
):
</
span
>
<
span
class
="
w
"
>
</
span
>
<
span
class
="
sd
"
>
"""Decorator used to register or wrap a cached property."""
</
span
>
<
span
class
="
k
"
>
return
</
span
>
<
span
class
="
p
"
>
(
</
span
>
<
span
class
="
n
"
>
CachedProperty
</
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>
<
span
class
="
k
"
>
if
</
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>
<
span
class
="
ow
"
>
not
</
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>
<
span
class
="
n
"
>
isdatadescriptor
</
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>
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class
="
p
"
>
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</
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>
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class
="
n
"
>
fget
</
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>
<
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class
="
p
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>
)
</
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>
<
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class
="
k
"
>
else
</
span
>
<
span
class
="
n
"
>
CachedProperty
</
span
>
<
span
class
="
o
"
>
.
</
span
>
<
span
class
="
n
"
>
wrap_descriptor
</
span
>
<
span
class
="
p
"
>
)(
</
span
>
<
span
class
="
n
"
>
fget
</
span
>
<
span
class
="
p
"
>
,
</
span
>
<
span
class
="
o
"
>
*
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span
>
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span
class
="
n
"
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args
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span
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class
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,
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kwargs
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span
class
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p
"
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)
</
span
>
</
div
>
<
div
class
="
viewcode-block
"
id
="
cached_result
"
>
<
a
class
="
viewcode-back
"
href
="
../../developing/modules/core.cache.html#core.cache.cached_result
"
>
[docs]
</
a
>
<
span
class
="
k
"
>
def
</
span
>
<
span
class
="
w
"
>
</
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>
<
span
class
="
nf
"
>
cached_result
</
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>
<
span
class
="
p
"
>
(
</
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>
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span
class
="
n
"
>
fget
</
span
>
<
span
class
="
p
"
>
):
</
span
>
<
span
class
="
w
"
>
</
span
>
<
span
class
="
sd
"
>
"""Decorator used to register a cached method.
</
span
>
<
span
class
="
sd
"
>
:param function fget:
</
span
>
<
span
class
="
sd
"
>
Method that is only called once and its result cached for subsequent
</
span
>
<
span
class
="
sd
"
>
calls.
</
span
>
<
span
class
="
sd
"
>
:rtype: CachedProperty
</
span
>
<
span
class
="
sd
"
>
"""
</
span
>
<
span
class
="
c1
"
>
# Get a dummy object as default cache, so that we can cache None
</
span
>
<
span
class
="
n
"
>
NONE
</
span
>
<
span
class
="
o
"
>
=
</
span
>
<
span
class
="
nb
"
>
object
</
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>
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span
class
="
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"
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()
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span
class
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def
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class
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</
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class
="
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"
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getter
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</
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<
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class
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self
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):
</
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>
<
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class
="
w
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</
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>
<
span
class
="
sd
"
>
"""Getter function that generates the cached method."""
</
span
>
<
span
class
="
c1
"
>
# Set our cache to the default value
</
span
>
<
span
class
="
n
"
>
cache
</
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>
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class
="
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=
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NONE
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# Wrap the decorated method as the inner function
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@wraps
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>
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fget
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"""Calls the decorated method and cache the result."""
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nonlocal
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>
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class
="
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cache
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class
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# Did we cache a result already?
</
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if
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is
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NONE
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span
class
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"
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:
</
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="
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"
>
# No cache, let's call the wrapped method and cache the result
</
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="
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"
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cache
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>
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span
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=
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span
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n
"
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fget
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="
p
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(
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="
bp
"
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self
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p
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,
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>
*
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="
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args
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,
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="
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"
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**
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class
="
n
"
>
kwargs
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>
<
span
class
="
p
"
>
)
</
span
>
<
span
class
="
c1
"
>
# Return the cached result
</
span
>
<
span
class
="
k
"
>
return
</
span
>
<
span
class
="
n
"
>
cache
</
span
>
<
span
class
="
c1
"
>
# Bind the wrapper function to the passed instance and return it
</
span
>
<
span
class
="
k
"
>
return
</
span
>
<
span
class
="
n
"
>
MethodType
</
span
>
<
span
class
="
p
"
>
(
</
span
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