|5k B d dl Z d dlZd dlZd dlZd dlZd dlZd dlZd dlm Z m
Z
e
de de f Z d Z
d Zd Z e j fd e d
e e ge f d e fd Zd
Zd Zd Zd Z G d d Zd Zd d dfdZd Zd Zd Zd Z d Z ddd d Z dS ) N)CallableTypeVar CallableT.)boundc 2 d }t j || S )a;
Compose any number of unary functions into a single unary function.
>>> import textwrap
>>> expected = str.strip(textwrap.dedent(compose.__doc__))
>>> strip_and_dedent = compose(str.strip, textwrap.dedent)
>>> strip_and_dedent(compose.__doc__) == expected
True
Compose also allows the innermost function to take arbitrary arguments.
>>> round_three = lambda x: round(x, ndigits=3)
>>> f = compose(round_three, int.__truediv__)
>>> [f(3*x, x+1) for x in range(1,10)]
[1.5, 2.0, 2.25, 2.4, 2.5, 2.571, 2.625, 2.667, 2.7]
c fdS )Nc & | i | S N )argskwargsf1f2s /builddir/build/BUILDROOT/alt-python311-setuptools-65.6.3-2.el9.x86_64/opt/alt/python311/lib/python3.11/site-packages/pkg_resources/_vendor/jaraco/functools.pyz.compose..compose_two..# s rr""d*=f*=*='>'> r )r r s ``r compose_twoz compose..compose_two" s >>>>>>r ) functoolsreduce)funcsr s r composer s& $? ? ? K / //r c fd}|S )z
Return a function that will call a named method on the
target object with optional positional and keyword
arguments.
>>> lower = method_caller('lower')
>>> lower('MyString')
'mystring'
c 4 t | } |i S r
)getattr)targetfuncr r
method_names r call_methodz"method_caller..call_method3 s' v{++tT$V$$$r r )r r r
r s ``` r
method_callerr ( s0 % % % % % % % r c ^ t j fd fd_ S )ad
Decorate func so it's only ever called the first time.
This decorator can ensure that an expensive or non-idempotent function
will not be expensive on subsequent calls and is idempotent.
>>> add_three = once(lambda a: a+3)
>>> add_three(3)
6
>>> add_three(9)
6
>>> add_three('12')
6
To reset the stored value, simply clear the property ``saved_result``.
>>> del add_three.saved_result
>>> add_three(9)
12
>>> add_three(8)
12
Or invoke 'reset()' on it.
>>> add_three.reset()
>>> add_three(-3)
0
>>> add_three(0)
0
c L t d s
| i |_ j S N saved_result)hasattrr# )r r
r wrappers r r% zonce..wrapperZ s5 w// 9#'4#8#8#8G ##r c H t d S r" )vars __delitem__)r% s r r zonce..` s DMM 5 5n E E r )r wrapsresetr r% s `@r oncer, : sR @ _T$ $ $ $ $ $
FEEEGM Nr method
cache_wrapperreturnc dt dt dt dt f fd }d |_ t p|S )aV
Wrap lru_cache to support storing the cache data in the object instances.
Abstracts the common paradigm where the method explicitly saves an
underscore-prefixed protected property on first call and returns that
subsequently.
>>> class MyClass:
... calls = 0
...
... @method_cache
... def method(self, value):
... self.calls += 1
... return value
>>> a = MyClass()
>>> a.method(3)
3
>>> for x in range(75):
... res = a.method(x)
>>> a.calls
75
Note that the apparent behavior will be exactly like that of lru_cache
except that the cache is stored on each instance, so values in one
instance will not flush values from another, and when an instance is
deleted, so are the cached values for that instance.
>>> b = MyClass()
>>> for x in range(35):
... res = b.method(x)
>>> b.calls
35
>>> a.method(0)
0
>>> a.calls
75
Note that if method had been decorated with ``functools.lru_cache()``,
a.calls would have been 76 (due to the cached value of 0 having been
flushed by the 'b' instance).
Clear the cache with ``.cache_clear()``
>>> a.method.cache_clear()
Same for a method that hasn't yet been called.
>>> c = MyClass()
>>> c.method.cache_clear()
Another cache wrapper may be supplied:
>>> cache = functools.lru_cache(maxsize=2)
>>> MyClass.method2 = method_cache(lambda self: 3, cache_wrapper=cache)
>>> a = MyClass()
>>> a.method2()
3
Caution - do not subsequently wrap the method with another decorator, such
as ``@property``, which changes the semantics of the function.
See also
http://code.activestate.com/recipes/577452-a-memoize-decorator-for-instance-methods/
for another implementation and additional justification.
selfr r
r/ c t j | } | }t | j | ||i |S r
)types
MethodTypesetattr__name__)r1 r r
bound_method
cached_methodr. r- s r r% z method_cache..wrapper sT "'"2 D#
#
&
l33
fo}555 }d-f---r c d S r
r r r r r z method_cache.. s $ r )object cache_clear_special_method_cache)r- r. r% s `` r method_cacher= d si R.f .V .v .& . . . . . . . ',G fm44?r c B j }d}||vrdS d|z fd}|S )a:
Because Python treats special methods differently, it's not
possible to use instance attributes to implement the cached
methods.
Instead, install the wrapper method under a different name
and return a simple proxy to that wrapper.
https://github.com/jaraco/jaraco.functools/issues/5
) __getattr__ __getitem__N__cachedc t | vr2t j | } | }t | | nt | } ||i |S r
)r' r3 r4 r5 r )r1 r r
r cacher. r- wrapper_names r proxyz$_special_method_cache..proxy sn tDzz ) )$VT22E!M%((E D, . . . .D,//Eud%f%%%r )r6 )r- r. name
special_namesrE rD s `` @r r< r< sW ?D0M = $L& & & & & & & Lr c fd}|S )ab
Decorate a function with a transform function that is
invoked on results returned from the decorated function.
>>> @apply(reversed)
... def get_numbers(start):
... "doc for get_numbers"
... return range(start, start+3)
>>> list(get_numbers(4))
[6, 5, 4]
>>> get_numbers.__doc__
'doc for get_numbers'
c Z t j | t | S r
)r r) r )r transforms r wrapzapply..wrap s' $yt$$WY%=%=>>>r r )rJ rK s ` r applyrL s# ? ? ? ? ? Kr c fd}|S )a@
Decorate a function with an action function that is
invoked on the results returned from the decorated
function (for its side-effect), then return the original
result.
>>> @result_invoke(print)
... def add_two(a, b):
... return a + b
>>> x = add_two(2, 3)
5
>>> x
5
c J t j fd }|S )Nc . | i |} | |S r
r )r r
resultactionr s r r% z,result_invoke..wrap..wrapper s) T4*6**F F6NNNMr r r) )r r% rQ s ` r rK zresult_invoke..wrap s>
r r )rQ rK s ` r
result_invokerS s# Kr c | |i | | S )ab
Call a function for its side effect after initialization.
>>> @call_aside
... def func(): print("called")
called
>>> func()
called
Use functools.partial to pass parameters to the initial call
>>> @functools.partial(call_aside, name='bingo')
... def func(name): print("called with", name)
called with bingo
r )fr r
s r
call_asiderV
s Atv Hr c H e Zd ZdZ ed fdZd Zd Zd Zd dZ dS )
Throttlerz3
Rate-limit a function (or other callable)
Infc t |t r|j }|| _ || _ | d S r
)
isinstancerX r max_rater* )r1 r r\ s r __init__zThrottler.__init__& s: dI & & 9D
r c d| _ d S )Nr ) last_called)r1 s r r* zThrottler.reset- s r c D | | j |i |S r
)_waitr )r1 r r
s r __call__zThrottler.__call__0 s&
ty$)&)))r c t j | j z
}d| j z |z
}t j t d| t j | _ dS )z1ensure at least 1/max_rate seconds from last call r N)timer_ r\ sleepmax)r1 elapsed must_waits r ra zThrottler._wait4 sT )++ 00
%/
3q)$$%%% 9;;r Nc \ t | j t j | j | S r
) first_invokera r partialr )r1 objtypes r __get__zThrottler.__get__; s# DJ (9$)S(I(IJJJr r
)
r6
__module__ __qualname____doc__floatr] r* rb ra ro r r r rX rX ! s ',eEll * * *' ' 'K K K K K Kr rX c fd}|S )z
Return a function that when invoked will invoke func1 without
any parameters (for its side-effect) and then invoke func2
with whatever parameters were passed, returning its result.
c ( | i |S r
r )r r
func1func2s r r% z first_invoke..wrapperF s#
ud%f%%%r r )rv rw r% s `` r rk rk ? s) & & & & & & Nr c d S r
r r r r r r M s T r r c |t d k rt j nt | }|D ]#} | c S # |$ r
| Y w xY w | S )z
Given a callable func, trap the indicated exceptions
for up to 'retries' times, invoking cleanup on the
exception. On the final attempt, allow any exceptions
to propagate.
inf)rs itertoolscountrange)r cleanupretriestrapattemptsattempts r
retry_callr M s %,uU||$;$;y w H 466MMM GIIIII 466Ms AAAc fd}|S )a7
Decorator wrapper for retry_call. Accepts arguments to retry_call
except func and then returns a decorator for the decorated function.
Ex:
>>> @retry(retries=3)
... def my_func(a, b):
... "this is my funk"
... print(a, b)
>>> my_func.__doc__
'this is my funk'
c L t j fd }|S )Nc N t j g| R i |}t |gR i S r
)r rl r )f_argsf_kwargsr r r_argsr_kwargss r r% z(retry..decorate..wrappern sA %d@V@@@x@@E e9f99999 9r rR )r r% r r s ` r decoratezretry..decoratem sC : : : : : :
: r r )r r r s `` r retryr ^ s) Or c t j t t }t t
j || } t j | | S )z
Convert a generator into a function that prints all yielded elements
>>> @print_yielded
... def x():
... yield 3; yield None
>>> x()
3
None
)r rl mapprintr more_itertoolsconsumer) )r print_all
print_resultss r
print_yieldedr x sD !#u--IN 2ItDDM 9?4 / //r c F t j fd }|S )z
Wrap func so it's not called if its first param is None
>>> print_text = pass_none(print)
>>> print_text('text')
text
>>> print_text(None)
c $ | | g|R i |S d S r
r )paramr r
r s r r% zpass_none..wrapper s1 4////// / r rR r+ s ` r pass_noner s: _T0 0 0 0 0 Nr c t j | }|j }fd|D }t j | fi |S )a
Assign parameters from namespace where func solicits.
>>> def func(x, y=3):
... print(x, y)
>>> assigned = assign_params(func, dict(x=2, z=4))
>>> assigned()
2 3
The usual errors are raised if a function doesn't receive
its required parameters:
>>> assigned = assign_params(func, dict(y=3, z=4))
>>> assigned()
Traceback (most recent call last):
TypeError: func() ...argument...
It even works on methods:
>>> class Handler:
... def meth(self, arg):
... print(arg)
>>> assign_params(Handler().meth, dict(arg='crystal', foo='clear'))()
crystal
c * i | ]}|v || S r r ).0k namespaces r
z!assign_params.. s$ AAA1!y..q)A,...r )inspect signature
parameterskeysr rl )r r sigparamscall_nss ` r
assign_paramsr sZ 4
D
!
!C
^
"
"FAAAAAAAG T - -W - --r c t t j dd t j fd }|S )a&
Wrap a method such that when it is called, the args and kwargs are
saved on the method.
>>> class MyClass:
... @save_method_args
... def method(self, a, b):
... print(a, b)
>>> my_ob = MyClass()
>>> my_ob.method(1, 2)
1 2
>>> my_ob._saved_method.args
(1, 2)
>>> my_ob._saved_method.kwargs
{}
>>> my_ob.method(a=3, b='foo')
3 foo
>>> my_ob._saved_method.args
()
>>> my_ob._saved_method.kwargs == dict(a=3, b='foo')
True
The arguments are stored on the instance, allowing for
different instance to save different args.
>>> your_ob = MyClass()
>>> your_ob.method({str('x'): 3}, b=[4])
{'x': 3} [4]
>>> your_ob._saved_method.args
({'x': 3},)
>>> my_ob._saved_method.args
()
args_and_kwargsz args kwargsc j dj z } || }t | || | g|R i |S )N_saved_)r6 r5 )r1 r r
attr_nameattrr r- s r r% z!save_method_args..wrapper sR / tV,,i&&&vd,T,,,V,,,r ) collections
namedtupler r) )r- r% r s ` @r save_method_argsr sT D ",->
NNO_V - - - - - - Nr )replaceusec fd}|S )a-
Replace the indicated exceptions, if raised, with the indicated
literal replacement or evaluated expression (if present).
>>> safe_int = except_(ValueError)(int)
>>> safe_int('five')
>>> safe_int('5')
5
Specify a literal replacement with ``replace``.
>>> safe_int_r = except_(ValueError, replace=0)(int)
>>> safe_int_r('five')
0
Provide an expression to ``use`` to pass through particular parameters.
>>> safe_int_pt = except_(ValueError, use='args[0]')(int)
>>> safe_int_pt('five')
'five'
c N t j fd }|S )Nc t | i |S # $ r' t cY S # t $ r cY cY S w xY ww xY wr
)eval TypeError)r r
exceptionsr r r s r r% z*except_..decorate..wrapper sw
#tT,V,,,
#
#
## 99$$$ # # #"NNNNN#
#s 7"7 3737rR )r r% r r r s ` r r zexcept_..decorate sH # # # # # # #
# r r )r r r r s ``` r except_r s/ 0 Or ) r re r r r3 r{ #pkg_resources.extern.more_itertools
pkg_resourcestypingr r r: r r r r, lru_cacher= r< rL rS rV rX rk r r r r r r r r r r r s! * * * * $ $ $ $ $ $ $ $
GKxV '< = = = 0 0 00 $' ' '\ W W W Y W
W W W Wt < * 8
(K K K K K K K K< *\12 " 4
0
0
0 $ . . .@+ + +\ "&4 % % % % % % %r