B Afxa@sZdZddlmZmZmZGdddZGdddeZGdddeZGd d d eZd S) z pint.converters ~~~~~~~~~~~~~~~ Functions and classes related to unit conversions. :copyright: 2016 by Pint Authors, see AUTHORS for more details. :license: BSD, see LICENSE for more details. ) HAS_NUMPYexplogc@s<eZdZdZeddZeddZd ddZd d d Zd S) Converterz Base class for value converters.cCsdS)NT)selfrr.lib/python3.7/site-packages/pint/converters.pyis_multiplicativeszConverter.is_multiplicativecCsdS)NFr)rrrris_logarithmicszConverter.is_logarithmicFcCs|S)Nr)rvalueinplacerrr to_referenceszConverter.to_referencecCs|S)Nr)rr r rrrfrom_referenceszConverter.from_referenceN)F)F) __name__ __module__ __qualname____doc__propertyr r r rrrrrrs    rc@s,eZdZdZddZd ddZd ddZd S) ScaleConverterzA linear transformation.cCs ||_dS)N)scale)rrrrr__init__$szScaleConverter.__init__FcCs|r||j9}n ||j}|S)N)r)rr r rrrr 's  zScaleConverter.to_referencecCs|r||j}n ||j}|S)N)r)rr r rrrr/s  zScaleConverter.from_referenceN)F)F)rrrrrr rrrrrr!s rc@s8eZdZdZddZeddZd ddZd d d Zd S)OffsetConverterzAn affine transformation.cCs||_||_dS)N)roffset)rrrrrrr;szOffsetConverter.__init__cCs |jdkS)N)r)rrrrr ?sz!OffsetConverter.is_multiplicativeFcCs.|r||j9}||j7}n||j|j}|S)N)rr)rr r rrrr Cs   zOffsetConverter.to_referencecCs.|r||j8}||j}n||j|j}|S)N)rr)rr r rrrrLs   zOffsetConverter.from_referenceN)F)F) rrrrrrr r rrrrrr8s   rc@sDeZdZdZddZeddZeddZdd d Zdd d Z d S)LogarithmicConverteraConverts between linear units and logarithmic units, such as dB, octave, neper or pH. Q_log = logfactor * log( Q_lin / scale ) / log(log_base) Parameters ---------- scale : float unit of reference at denominator for logarithmic unit conversion logbase : float base of logarithm used in the logarithmic unit conversion logfactor : float factor multiplied to logarithm for unit conversion inplace : bool controls if computation is done in place cCs||_||_||_dS)a< Parameters ---------- scale : float unit of reference at denominator inside logarithm for unit conversion logbase: float base of logarithm used in unit conversion logfactor: float factor multiplied to logarithm for unit conversion N)rlogbase logfactor)rrrrrrrrfs zLogarithmicConverter.__init__cCsdS)NFr)rrrrr vsz&LogarithmicConverter.is_multiplicativecCsdS)NTr)rrrrr zsz#LogarithmicConverter.is_logarithmicFcCs^|r<||j}trt||nt|}||jt|j9}n|jt||jt|j}|S)zConverts value from the reference unit to the logarithmic unit dBm <------ mW y dBm = 10 log10( x / 1mW ) )rrrrr)rr r rrrr~s  z#LogarithmicConverter.from_referencecCsb|r@||j}|t|j9}tr,t||nt|}||j9}n|jtt|j||j}|S)zConverts value to the reference unit from the logarithmic unit dBm ------> mW y dBm = 10 log10( x / 1mW ) )rrrrrr)rr r rrrr s   z!LogarithmicConverter.to_referenceN)F)F) rrrrrrr r rr rrrrrVs    rN) rcompatrrrrrrrrrrr s