ArcGIS字段计算器中的python函数

ArcGIS字段计算器中的python函数.conjugate()，共轭复数.denominator()，返回分母.imag()，返回复数的虚数部分.numerator()，返回分子.real()，返回复数的实数部分.as_interger_ratio()：Returnapairofintegerswhoseratioisexactlyequaltotheoriginalfloatandwithapositivedenominator.RaisesOverflowErroroninfinitiesandaValueErroronNaNs..fromhex()：Classmethodtoreturnthefloatrepresentedbyahexadecimalstrings.Thestringsmayhaveleadingandtrailingwhitespace..hex()：Returnarepresentationofafloating-pointnumberasahexadecimalstring.Forfinitefloating-pointnumbers,thisrepresentationwillalwaysincludealeading0xandatrailingpandexponent..is_integer()：ReturnTrueifthefloatinstanceisfinitewithintegralvalue,andFalseotherwise:math.acos()：反余弦（弧度）math.acosh()：反双曲余弦math.asin()：反正弦math.asinh()：反双曲正弦math.atan()：反正切math.atan2()：Returnatan(y/x),inradians.Theresultisbetween-piandpi.Thevectorintheplanefromtheorigintopoint(x,y)makesthisanglewiththepositiveXaxis.Thepointofatan2()isthatthesignsofbothinputsareknowntoit,soitcancomputethecorrectquadrantfortheangle.Forexample,atan(1)andatan2(1,1)arebothpi/4,butatan2(-1,-1)is-3*pi/4.math.atanh()：反双曲正切math.ceil()：Returntheceilingofxasafloat,thesmallestintegervaluegreaterthanorequaltoxmath.copysign()：Returnxwiththesignofy.Onaplatformthatsupportssignedzeros,copysign(1.0,-0.0)returns-1.0.math.cos()：余弦math.cosh()：双曲余弦math.degrees()：转弧度为度math.e()：emath.exp()：e的指数次方math.fabs()：绝对值math.factorial()：Returnxfactorial.RaisesValueErrorifxisnotintegralorisnegative，（阶乘）math.floor()：Returnthefloorofxasafloat,thelargestintegervaluelessthanorequaltox.（小于等于x的最大整数）math.fmod()：Returnfmod(x,y),asdefinedbytheplatformClibrary.NotethatthePythonexpressionx%ymaynotreturnthesameresult.TheintentoftheCstandardisthatfmod(x,y)beexactly(mathematically;toinfiniteprecision)equaltox-n*yforsomeintegernsuchthattheresulthasthesamesignasxandmagnitudelessthanabs(y).Python’sx%yreturnsaresultwiththesignofyinstead,andmaynotbeexactlycomputableforfloatarguments.Forexample,fmod(-1e-100,1e100)is-1e-100,buttheresultofPython’s-1e-100%1e100is1e100-1e-100,whichcannotberepresentedexactlyasafloat,androundstothesurprising1e100.Forthisreason,functionfmod()isgenerallypreferredwhenworkingwithfloats,whilePython’sx%yispreferredwhenworkingwithintegers.matn.frexp()：Returnthemantissaandexponentofxasthepair(m,e).misafloatandeisanintegersuchthatx==m*2**eexactly.Ifxiszero,returns(0.0,0),otherwise0.5=abs(m)1.Thisisusedto“pickapart”theinternalrepresentationofafloatinaportableway.math.fsum()：Returnanaccuratefloatingpointsumofvaluesintheiterable.Avoidslossofprecisionbytrackingmultipleintermediatepartialsums:math.htpot()：ReturntheEuclideannorm,sqrt(x*x+y*y).Thisisthelengthofthevectorfromtheorigintopoint(x,y).math.isinf()：Checkifthefloatxispositiveornegativeinfinitymath.isnan()：CheckifthefloatxisaNaN(notanumber).FormoreinformationonNaNs,seetheIEEE754standardsmath.ldexp()：Returnx*(2**i).Thisisessentiallytheinverseoffunctionfrexp()math.log()：以e为底的对数math.log10()：以10为底对数math.log1p()：Returnthenaturallogarithmof1+x(basee).Theresultiscalculatedinawaywhichisaccurateforxnearzeromath.modf()：Returnthefractionalandintegerpartsofx.Bothresultscarrythesignofxandarefloats.math.pi()：πmath.pow()：x的y次幂math.radians()：转度为弧度math.sin()：正弦math.sinh()：双曲正弦math.sqrt()：平方根math.tan()：正切math.tanh()：双曲正切matn.trunc()：ReturntheRealvaluextruncatedtoanIntegral(usuallyalonginteger).Usesthe__trunc__method