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Python units/quantities packages

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.
Site webPyPI DLs/monthGitHub StarsUsed byBuilt-in unitsBuilt-in constantsArbitrary prefixesnp scalar arraynp object arrayDecimalFractionUncertaintiesstringabsolute °CdBSyntaxeCommentaires 3857 087181 360Oui 50Oui 400 in CODATANon- no unit objects- no unit objects- no unit objects- no unit objects- no unit objects- no unit objectsNonNonconstants.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. 4246 92418 324Oui 200?Oui- u.mega*u.meter but not u.megameterNonOui array([1, 2, 3])*u.m- converts to sympy- converts to sympycm = u.m/100 3582 43513 777OuiOuiNonOui-OuiOui15.1 * u.meter / (32.0 * u.second) 7461 1281 579OuiOuiOui Mm, GV, etc.Oui array([1,2,3])*ureg.m or ureg.m*array([1,2,3])Non ValueErrorOuiOuiOui built-inOuiOuiNonV = 1***3 101Oui 33Oui km4*m + 3*cm - 5*ft + 6*yard
Quantitiesreadthedocs.org3 917147231Oui array([1,2,3]) * pq.JNon 376 issues, random set of units = not deterministic, need to do calculations twice to confirm they are being done correctly
SciMath built-in 53NonOuiV = Number(1,dims='decimeter^3')Single file 40OuiOui m*array([1, 2, 3])Oui array([1, 2, 3])*mNonNonOuiNonOuiOuiV = 1*dm**3weird format for dB, Hz != 1/s, "pre-release state" wrapper for UDUNITS2 K, Cel, degF, degROui dB, Np, dBm, dBmW, ... (both B and dB)quant(3, 'J').to('kg*m2/s2')
quant([5.9e-4, 5.2e+5], 'J*s-1').to('W')
33*unit('kg'), const('c')
No registries needed like for Pint. Documentation is available here:
Compare Python packages for units/quantities conversions
1 jun. 2024 10:32:47
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Avis utilisateurs et commentaires

  • LuisFuture le 21 déc. 2023 12:20:30

    Great comparison on Python units and quantities packages! For those looking to implement such tools in a project, partnering with a top Python team can make a huge difference. Check out Attract Group, recently hailed as a leading Python and Django firm by Techreviewer, check top python and django company in 2021. Their expertise could be invaluable for your project's success.