[c@`sdZddlmZmZmZmZddlZddlmZddl m Z ddl m Z ddl mZd Zd d Zd Zd ZdZdZdZdS(u, Utilities shared by the different formats. i(tabsolute_importtdivisiontprint_functiontunicode_literalsN(tFractioni(tsix(tzip(t did_you_meancC`sg}g}xnt||D]]\}}|dkrK|j|| fq|dkrm|j||fqtdqW||fS(u Groups the powers and bases in the given `~astropy.units.CompositeUnit` into positive powers and negative powers for easy display on either side of a solidus. Parameters ---------- bases : list of `astropy.units.UnitBase` instances powers : list of ints Returns ------- positives, negatives : tuple of lists Each element in each list is tuple of the form (*base*, *power*). The negatives have the sign of their power reversed (i.e. the powers are all positive). iuUnit with 0 power(Rtappendt ValueError(tbasestpowerstpositivetnegativetbasetpower((s9lib/python2.7/site-packages/astropy/units/format/utils.pytget_grouped_by_powerss  u.8gcC`st||jd}|dddt|ddkrK|d}nd}t|dkr|djd}t|dkr|dd krd |djd}qnd}||fS( uq Given a number, split it into its mantissa and base 10 exponent parts, each as strings. If the exponent is too small, it may be returned as the empty string. Parameters ---------- v : float format_spec : str, optional Number representation formatting string Returns ------- mantissa, exponent : tuple of strings ueiu1.u0iuiu0+u-(tformattsplittlentlstrip(tvt format_spectxtmtex((s9lib/python2.7/site-packages/astropy/units/format/utils.pytsplit_mantissa_exponent1s& "cC`sddlm}t||jru|j|j}x:t|j|jD]#\}}|t |||}qJW|St||j ry||Wn6t k rt||jrt |j |SnX|SdS(u Partially decomposes a unit so it is only composed of units that are "known" to a given format. Parameters ---------- unit : `~astropy.units.UnitBase` instance func : callable This function will be called to determine if a given unit is "known". If the unit is not known, this function should raise a `ValueError`. Returns ------- unit : `~astropy.units.UnitBase` instance A flattened unit. i(tcoreN( tRt isinstancet CompositeUnittUnittscaleRR R tdecompose_to_known_unitst NamedUnitR t _represents(tunittfuncRtnew_unitRR((s9lib/python2.7/site-packages/astropy/units/format/utils.pyR!Rs" cC`s}t|tsp|ddkratj|}|jd}|jdkrmt|j}qmqpt|}ntj|S(u Converts a value for a power (which may be floating point or a `fractions.Fraction` object), into a string either looking like an integer or a fraction. g?gi i( RRt from_floattlimit_denominatort denominatortintt numeratorRt text_type(Rtfrac((s9lib/python2.7/site-packages/astropy/units/format/utils.pyt format_poweruscC`st|dd}|dk rIy||}Wntk rAqIX|Sn|j}||k ry||}Wntk rqX|SndS(Nu _represents(tgetattrtNoneR t decompose(R$tformat_decomposedt representstrepresents_stringt decomposedtdecompose_string((s9lib/python2.7/site-packages/astropy/units/format/utils.pyt_try_decomposeds     c`s(fd}t|d|S(uc A wrapper around `astropy.utils.misc.did_you_mean` that deals with the display of deprecated units. Parameters ---------- s : str The invalid unit string all_units : dict A mapping from valid unit names to unit objects. deprecated_units : sequence The deprecated unit names format_decomposed : callable A function to turn a decomposed version of the unit into a string. Should return `None` if not possible Returns ------- msg : str A string message with a list of alternatives, or the empty string. c`sS|krL|dg}t|}|dk rH|j|n|S|fS(Nu (deprecated)(R7R0R(RtresultsR5(t all_unitstdeprecated_unitsR2(s9lib/python2.7/site-packages/astropy/units/format/utils.pytfix_deprecateds   tfix(R(tsR9R:R2R;((R9R:R2s9lib/python2.7/site-packages/astropy/units/format/utils.pytdid_you_mean_unitss cC`sgddlm}dj||}t||}|dk rS|dj|7}ntj||dS(u Raises a UnitsWarning about a deprecated unit in a given format. Suggests a decomposed alternative if one is available. Parameters ---------- s : str The deprecated unit name. unit : astropy.units.core.UnitBase The unit object. standard_name : str The name of the format for which the unit is deprecated. format_decomposed : callable A function to turn a decomposed version of the unit into a string. Should return `None` if not possible i(t UnitsWarningu7The unit '{0}' has been deprecated in the {1} standard.u Suggested: {0}.N(RR?RR7R0twarningstwarn(R=R$t standard_nameR2R?tmessageR5((s9lib/python2.7/site-packages/astropy/units/format/utils.pytunit_deprecation_warnings  (t__doc__t __future__RRRRR@t fractionsRtexternRtextern.six.movesRt utils.miscRRRR!R.R7R>RD(((s9lib/python2.7/site-packages/astropy/units/format/utils.pyts"   ! #   '