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fractions.cpython-311.opt-1.pyc
>bw d Z ddlmZ ddlZddlZddlZddlZddlZdgZej j Z ej j Z ej dej ej z Z G d dej ZdS )z/Fraction, infinite-precision, rational numbers. DecimalNFractiona \A\s* # optional whitespace at the start, (?P<sign>[-+]?) # an optional sign, then (?=\d|\.\d) # lookahead for digit or .digit (?P<num>\d*|\d+(_\d+)*) # numerator (possibly empty) (?: # followed by (?:/(?P<denom>\d+(_\d+)*))? # an optional denominator | # or (?:\.(?P<decimal>\d*|\d+(_\d+)*))? # an optional fractional part (?:E(?P<exp>[-+]?\d+(_\d+)*))? # and optional exponent ) \s*\Z # and optional whitespace to finish c l e Zd ZdZdZd.dd fd Zed Zed Zd Z d/d Z e d Z e d Z d Zd Zd Zd Z eeej \ ZZd Z eeej \ ZZd Z eeej \ Z Z d Z ee ej \ Z Z!d Z" ee"ej# \ Z$Z%d Z& ee&e' \ Z(Z)d Z* ee*ej+ \ Z,Z-d Z.d Z/d Z0d Z1d Z2ej3 fd Z4d Z5d Z6d! Z7d0d"Z8d# Z9d$ Z:d% Z;d& Z<d' Z=d( Z>d) Z?d* Z@d+ ZAd, ZBd- ZC xZDS )1r a] This class implements rational numbers. In the two-argument form of the constructor, Fraction(8, 6) will produce a rational number equivalent to 4/3. Both arguments must be Rational. The numerator defaults to 0 and the denominator defaults to 1 so that Fraction(3) == 3 and Fraction() == 0. Fractions can also be constructed from: - numeric strings similar to those accepted by the float constructor (for example, '-2.3' or '1e10') - strings of the form '123/456' - float and Decimal instances - other Rational instances (including integers) _numerator _denominatorr NT _normalizec t t | | }|t | t u r||_ d|_ |S t |t j r|j |_ |j |_ |S t |t t f r#| \ |_ |_ |S t |t r/t | }|t% d|z t | d pd }| d }|rt | }nd}| d }|rB| dd }d t+ | z }||z t | z }||z }| d } | r't | } | d k r |d | z z }n |d | z z }| d dk r| }nt- d t | t cxu rt | u rn nnbt |t j r9t |t j r |j |j z |j |j z }}nt- d |d k rt/ d|z |r(t1 j || } |d k r| } || z }|| z }||_ ||_ |S )a Constructs a Rational. Takes a string like '3/2' or '1.5', another Rational instance, a numerator/denominator pair, or a float. Examples -------- >>> Fraction(10, -8) Fraction(-5, 4) >>> Fraction(Fraction(1, 7), 5) Fraction(1, 35) >>> Fraction(Fraction(1, 7), Fraction(2, 3)) Fraction(3, 14) >>> Fraction('314') Fraction(314, 1) >>> Fraction('-35/4') Fraction(-35, 4) >>> Fraction('3.1415') # conversion from numeric string Fraction(6283, 2000) >>> Fraction('-47e-2') # string may include a decimal exponent Fraction(-47, 100) >>> Fraction(1.47) # direct construction from float (exact conversion) Fraction(6620291452234629, 4503599627370496) >>> Fraction(2.25) Fraction(9, 4) >>> Fraction(Decimal('1.47')) Fraction(147, 100) N z Invalid literal for Fraction: %rnum0denomdecimal_ expr sign-z2argument should be a string or a Rational instancez+both arguments should be Rational instanceszFraction(%s, 0))superr __new__typeintr r isinstancenumbersRational numerator denominatorfloatr as_integer_ratiostr_RATIONAL_FORMATmatch ValueErrorgroupreplacelen TypeErrorZeroDivisionErrormathgcd) clsr r r selfmr r scaler g __class__s ./opt/alt/python311/lib/python3.11/fractions.pyr zFraction.__new__> s- > Xs##++C00 I#%%"+$%! Iw'788 ( :"+"5$-$9! Iw'788 # :5>5O5O5Q5Q2!2 Is++ :$**9559$%G%.&/ 0 0 0 5# 6 6 (( 4"%e**KK"#K ggi 0 0G -")//#r":": "CLL 0$-$5G $D #u, ''%..C 4 !#hh !88 %S 0II '2t8 3K776??c))!* I !9 : : : )__ 8 8 8 8tK'8'8 8 8 8 8 8 G$455 2 {G$4 5 5 2 #k&==% (== #II 1 2 2 2 ! #$5 $ABB B K00AQB !OI A K# ' c t |t j r | | S t |t s/t | j d|dt | j d | | S )zConverts a finite float to a rational number, exactly. Beware that Fraction.from_float(0.3) != Fraction(3, 10). z%.from_float() only takes floats, not ())r r Integralr! r* __name__r r" )r. fs r4 from_floatzFraction.from_float s a) * * A3q66MAu%% A \\\111d1gg.>.>.> @ A A AsA&&(())r5 c ddl m} t |t j r |t | }n?t || s/t | j d|dt | j d | | S )zAConverts a finite Decimal instance to a rational number, exactly.r r z).from_decimal() only takes Decimals, not r7 r8 ) r r r r r9 r r* r: r r" )r. decr s r4 from_decimalzFraction.from_decimal s $##### c7+ , , 9'#c((##CCC)) 9 sssDII$6$6$689 9 9 sC((**++r5 c | j | j fS )zReturn the integer ratio as a tuple. Return a tuple of two integers, whose ratio is equal to the Fraction and with a positive denominator. r r/ s r4 r" zFraction.as_integer_ratio s !233r5 @B c |dk rt d | j |k rt | S d\ }}}}| j | j }} ||z }|||z z } | |k rn |||||z z | f\ }}}}||||z z }}0||z |z } t || |z z || |z z } t || } t | | z t | | z k r| S | S )aW Closest Fraction to self with denominator at most max_denominator. >>> Fraction('3.141592653589793').limit_denominator(10) Fraction(22, 7) >>> Fraction('3.141592653589793').limit_denominator(100) Fraction(311, 99) >>> Fraction(4321, 8765).limit_denominator(10000) Fraction(4321, 8765) r z$max_denominator should be at least 1)r r r r )r& r r r abs) r/ max_denominatorp0q0p1q1ndaq2kbound1bound2s r4 limit_denominatorzFraction.limit_denominator s @ Q CDD D / /D>> !#BB 11 1AAbDBO## R"Wb 0NBBa!eqA R " $"QrT'2ad7++"b!! v} VD[!1!1 1 1MMr5 c | j S N)r rL s r4 r zFraction.numerator s |r5 c | j S rS )r rT s r4 r zFraction.denominator s ~ r5 c @ | j j d| j d| j dS )z repr(self)(z, r8 )r3 r: r r rA s r4 __repr__zFraction.__repr__ s0 #~ 6 6 6 #0A0A0AC Cr5 c b | j dk rt | j S | j d| j S )z str(self)r /)r r# r rA s r4 __str__zFraction.__str__ s7 ! !t'' ' "ooot/@/@A Ar5 c fd}dj z dz |_ j |_ fd}dj z dz |_ j |_ ||fS )a Generates forward and reverse operators given a purely-rational operator and a function from the operator module. Use this like: __op__, __rop__ = _operator_fallbacks(just_rational_op, operator.op) In general, we want to implement the arithmetic operations so that mixed-mode operations either call an implementation whose author knew about the types of both arguments, or convert both to the nearest built in type and do the operation there. In Fraction, that means that we define __add__ and __radd__ as: def __add__(self, other): # Both types have numerators/denominator attributes, # so do the operation directly if isinstance(other, (int, Fraction)): return Fraction(self.numerator * other.denominator + other.numerator * self.denominator, self.denominator * other.denominator) # float and complex don't have those operations, but we # know about those types, so special case them. elif isinstance(other, float): return float(self) + other elif isinstance(other, complex): return complex(self) + other # Let the other type take over. return NotImplemented def __radd__(self, other): # radd handles more types than add because there's # nothing left to fall back to. if isinstance(other, numbers.Rational): return Fraction(self.numerator * other.denominator + other.numerator * self.denominator, self.denominator * other.denominator) elif isinstance(other, Real): return float(other) + float(self) elif isinstance(other, Complex): return complex(other) + complex(self) return NotImplemented There are 5 different cases for a mixed-type addition on Fraction. I'll refer to all of the above code that doesn't refer to Fraction, float, or complex as "boilerplate". 'r' will be an instance of Fraction, which is a subtype of Rational (r : Fraction <: Rational), and b : B <: Complex. The first three involve 'r + b': 1. If B <: Fraction, int, float, or complex, we handle that specially, and all is well. 2. If Fraction falls back to the boilerplate code, and it were to return a value from __add__, we'd miss the possibility that B defines a more intelligent __radd__, so the boilerplate should return NotImplemented from __add__. In particular, we don't handle Rational here, even though we could get an exact answer, in case the other type wants to do something special. 3. If B <: Fraction, Python tries B.__radd__ before Fraction.__add__. This is ok, because it was implemented with knowledge of Fraction, so it can handle those instances before delegating to Real or Complex. The next two situations describe 'b + r'. We assume that b didn't know about Fraction in its implementation, and that it uses similar boilerplate code: 4. If B <: Rational, then __radd_ converts both to the builtin rational type (hey look, that's us) and proceeds. 5. Otherwise, __radd__ tries to find the nearest common base ABC, and fall back to its builtin type. Since this class doesn't subclass a concrete type, there's no implementation to fall back to, so we need to try as hard as possible to return an actual value, or the user will get a TypeError. c t |t t f r | | S t |t r t | | S t |t r t | | S t S rS )r r r r! complexNotImplemented)rL bfallback_operatormonomorphic_operators r4 forwardz-Fraction._operator_fallbacks.<locals>.forwarde s !c8_-- &++Aq111Au%% &((q1555Aw'' &((Q777%%r5 __c ^ t |t j r || S t |t j r& t | t | S t |t j r& t | t | S t S rS )r r r Realr! Complexr^ r_ )r` rL ra rb s r4 reversez-Fraction._operator_fallbacks.<locals>.reverseq s !W -.. &++Aq111Aw|,, &((q588<<<Aw// &((WQZZ@@@%%r5 __r)r: __doc__)rb ra rc rh s `` r4 _operator_fallbacksz Fraction._operator_fallbacks s ` & & & & & & "3"<<tC.6 & & & & & & !#4#==D.6 r5 c h | j | j }}|j |j }}t j || }|dk r t ||z ||z z ||z d S ||z }|||z z ||z z }t j || } | dk rt |||z d S t || z ||| z z d S )za + br Fr r r r, r- r rL r` nadanbdbr2 stg2s r4 _addz Fraction._add amBamB HR 66BGb2g -rBw5III I !G "'NR!V # Xa^^ 77Aq2v%888 8RbBh EBBBBr5 c h | j | j }}|j |j }}t j || }|dk r t ||z ||z z ||z d S ||z }|||z z ||z z }t j || } | dk rt |||z d S t || z ||| z z d S )za - br Fr rm rn s r4 _subz Fraction._sub rw r5 c | j | j }}|j |j }}t j || }|dk r ||z }||z }t j || }|dk r ||z }||z }t ||z ||z d S )za * br Fr rm )rL r` ro rp rq rr g1ru s r4 _mulz Fraction._mul s amBamB Xb" 66 2IB 2IB Xb" 66 2IB 2IBRbU;;;;r5 c | j | j }}|j |j }}t j || }|dk r ||z }||z }t j || }|dk r ||z }||z }||z ||z } }| dk r| | } }t || d S )za / br r Fr rm ) rL r` ro rp rq rr r{ ru rJ rK s r4 _divz Fraction._div s amBamB Xb" 66 2IB 2IB Xb" 66 2IB 2IBBwR1 q552rqA1////r5 c @ | j |j z | j |j z z S )za // br r rL r` s r4 _floordivzFraction._floordiv s am+ 1LMMr5 c | j |j }}t | j |z ||j z \ }}|t |||z fS )z(a // b, a % b))r divmodr r )rL r` rp rr divn_mods r4 _divmodzFraction._divmod sI BAK" ,b1;.>?? UHUBG,,,,r5 c j | j |j }}t | j |z |j |z z ||z S )za % b)r r r )rL r` rp rr s r4 _modz Fraction._mod s6 Br)akB.>?bIIIr5 c t |t j r|j dk r|j }|dk r"t | j |z | j |z d S | j dk r$t | j | z | j | z d S t | j | z | j | z d S t | t | z S t | |z S )za ** b If b is not an integer, the result will be a float or complex since roots are generally irrational. If b is an integer, the result will be rational. r r Fr ) r r r r r r r r r! )rL r` powers r4 __pow__zFraction.__pow__ s a) * * !}!! A::#ALE$9$%Ne$;/4 6 6 6 6 \Q&&#ANuf$<$%LUF$:/4 6 6 6 6 $an_%$?&'l]v$=/4 6 6 6 6 Qxx588++88q= r5 c | j dk r| j dk r || j z S t |t j r t |j |j | z S | j dk r || j z S |t | z S )za ** br r ) r r r r r r r r r! )r` rL s r4 __rpow__zFraction.__rpow__; s >Q 1<1#4#4 $ $ a) * * =AK 771< < >Q $ $E!HH} r5 c : t | j | j d S )z++a: Coerces a subclass instance to FractionFr r r r rT s r4 __pos__zFraction.__pos__I s anGGGGr5 c < t | j | j d S )z-aFr r rT s r4 __neg__zFraction.__neg__M s q~%HHHHr5 c T t t | j | j d S )zabs(a)Fr )r rD r r rT s r4 __abs__zFraction.__abs__Q s# AL))1>eLLLLr5 c | | j dk r || j | j z S || j | j z S )zint(a)r r )rL _indexs r4 __int__zFraction.__int__U sF <! 6Q\MQ^ ;<== =6!,!.899 9r5 c X | j dk r| j | j z S | j | j z S )z math.trunc(a)r r rT s r4 __trunc__zFraction.__trunc__\ s2 <! l]an45 5<1>1 1r5 c | j | j z S )z math.floor(a)r rT s r4 __floor__zFraction.__floor__c s {am++r5 c $ | j | j z S )z math.ceil(a)r rT s r4 __ceil__zFraction.__ceil__g s + .//r5 c Z |Pt | j | j \ }}|dz | j k r|S |dz | j k r|dz S |dz dk r|S |dz S dt | z }|dk r t t | |z | S t t | |z |z S )z?round(self, ndigits) Rounds half toward even. N r r r )r r r rD r round)r/ ndigitsfloor remaindershifts r4 __round__zFraction.__round__l s ? %dnd6F G G E91}t /// Q !111 qy a qy CLL Q;;E$, / /77 7E$, / /% 788 8r5 c t | j dt }t t t | j |z }n# t $ r t }Y nw xY w| j dk r|n| }|dk rdn|S )z hash(self)r )powr _PyHASH_MODULUShashrD r r& _PyHASH_INF)r/ dinvhash_results r4 __hash__zFraction.__hash__ s <t("o>>D( c$/ 2 233d:;;EE' EEE ( /Q..UFr\\rrv-s A A#"A#c t | t u r| j |k o | j dk S t |t j r | j |j k o| j |j k S t |t j r|j dk r|j }t |t rGt j | st j | rd|k S | | | k S t" S )za == br r )r r r r r r r r r rg imagrealr! r, isnanisinfr< r_ r s r4 __eq__zFraction.__eq__ s 77c>><1$< 1)< < a) * * 5LAK/ 4Nam3 5 a ) ) afkkA a "z!}} , 1 , axALLOO++ " !r5 c ` t |t j r& || j |j z | j |j z S t |t rSt j | st j | r |d| S || | | S t S )ac Helper for comparison operators, for internal use only. Implement comparison between a Rational instance `self`, and either another Rational instance or a float `other`. If `other` is not a Rational instance or a float, return NotImplemented. `op` should be one of the six standard comparison operators. r ) r r r r r r r r! r, r r r< r_ )r/ otherops r4 _richcmpzFraction._richcmp s eW - . . ;2do(99'%/9; ; ; eU # # "z% 8DJu$5$5 8r#u~~%r$ 6 6777! !r5 c B | |t j S )za < b)r operatorltr s r4 __lt__zFraction.__lt__ zz!X[)))r5 c B | |t j S )za > b)r r gtr s r4 __gt__zFraction.__gt__ r r5 c B | |t j S )za <= b)r r ler s r4 __le__zFraction.__le__ r r5 c B | |t j S )za >= b)r r ger s r4 __ge__zFraction.__ge__ r r5 c * t | j S )za != 0)boolr rT s r4 __bool__zFraction.__bool__ s AL!!!r5 c , | j | j | j ffS rS )r3 r r rA s r4 __reduce__zFraction.__reduce__ s $2C DEEr5 c v t | t k r| S | | j | j S rS r r r3 r r rA s r4 __copy__zFraction.__copy__ 1 :: ! !K~~dot/@AAAr5 c v t | t k r| S | | j | j S rS r )r/ memos r4 __deepcopy__zFraction.__deepcopy__ r r5 )r N)rB rS )Er: __module__ __qualname__rj __slots__r classmethodr< r? r" rQ propertyr r rX r[ rk rv r add__add____radd__ry sub__sub____rsub__r| mul__mul____rmul__r~ truediv __truediv__ __rtruediv__r floordiv __floordiv__ __rfloordiv__r r __divmod__ __rdivmod__r mod__mod____rmod__r r r r r indexr r r r r r r r r r r r r r r r __classcell__)r3 s @r4 r r & s ( /Ih$ h h h h h h hT * * [ * , , [ ,4 4 45 5 5 5n X X C C C B B Bi i i ^ C C C ,+D(,??GX C C C ,+D(,??GX < < < ,+D(,??GX0 0 0$ !4 3D(:J K K K N N N #6"5iAR"S"S L-- - - 2 1'6 B BJ J J J ,+D(,??GX ! ! !< H H HI I IM M M #. : : : :2 2 2, , ,0 0 0 9 9 9 92 . . .B" " "*" " ",* * ** * ** * ** * *" " "F F FB B B B B B B B B Br5 )rj r r r, r r resys__all__ hash_infomodulusr infr compileVERBOSE IGNORECASEr$ r r r5 r4 <module>r s 6 5 , -' m 2: Z"- ! ! N B N B N B N B N Bw N B N B N B N B N Br5