Python units/quantities packages

Business > IT development > Frameworks
2016-05-09 20:40:39
There are far too many different packages for unit conversion / quantities calculations in Python. Developers should cooperate on one package instead of fragmenting development across many different ones. This documents which features are supported by each package.
Last updateWebsitePyPI DLs/monthLast UpdateBuilt-in unitsBuilt-in constantsArbitrary prefixesnp scalar arraynp object arrayDecimalFractionUncertaintiesstringabsolute °CdBSyntaxComments
scipy.constants2016-03-07 03:52:06 50Yes 400 in CODATANo- no unit objects- no unit objects- no unit objects- no unit objects- no unit objects- no unit objectsNoNoconstants.c == 299792458.0Just tables of numerical constants; unit-aware calculations not supported. scipy.constants.physical_constants specifies units as strings and uncertainties. Could be used to supply other packages with coefficients.
sympy.physics.units2016-03-07 03:52:06 200?Yes- u.mega*u.meter but not u.megameterNoYes array([1, 2, 3])*u.m- converts to sympy- converts to sympycm = u.m/100
Pint2016-05-09 20:40:39 Mm, GV, etc.Yes array([1,2,3])*ureg.m or ureg.m*array([1,2,3])No ValueErrorYesYesYes built-inYesYesNoV = 1***3
astropy.units2016-03-07 03:54:44 * u.meter / (32.0 * u.second)
Quantities2016-03-07 03:54:44http://python-quantities.readthedocs.org39172016-02-21Yes array([1,2,3]) * pq.JNo
Units2016-03-07 03:52:06
numericalunits2016-03-07 03:54:44 issues, random set of units = not deterministic, need to do calculations twice to confirm they are being done correctly
SciMath Units2016-03-07 03:56:59 built-in
Buckingham2016-03-07 03:56:59 53NoYesV = Number(1,dims='decimeter^3')Single file
Unum2016-03-07 03:52:06
natu2016-03-07 03:52:06 40YesYes m*array([1, 2, 3])Yes array([1, 2, 3])*mNoNoYesNoYesYesV = 1*dm**3weird format for dB, Hz != 1/s
misu2016-03-07 03:52:06
Magnitude2016-03-07 03:52:06
udunitspy2016-03-07 03:52:06 wrapper for UDUNITS2
DimPy2016-03-07 03:52:06
Scalar2016-03-07 03:52:06
ScientificPython PhysicalQuantities2016-03-07 03:52:06
  • 2016-03-06 19:38:38
    2016-05-09 20:40:39
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