On Wednesday, 8 January 2014 16:47:52 UTC, Erik Cederstrand wrote: > > Den 08/01/2014 kl. 17.11 skrev Timothy W. Cook <[email protected]<javascript:>>: > > > > But one would think that if Django calls it a decimal field, it would > convert the float to decimal. > > I suppose I'll do that before writing it out to the file (an XML schema) > so it really isn't a big deal, just surprising. > > Ah, the “decimal” in DecimalField only refers to how you are supposed to > enter the values in a form. Python itself only has float and that’s what > Django uses internally. Decimal vs. scientific notation is just a matter of > how you choose to format the output when converting the float to a string. > The default in Python depends on the value: > > >>> str(0.1) > '0.1' > >>> str(0.00001) > '1e-05’ >
No, no, no. None of this is true. Decimals are not a differently-formatted version of floats. Decimals are not a built-in datatype in Python, it's true, but they are provided in the standard library in (not surprisingly) the `decimal` module. As the documentation for that module explains, decimals do provide precise floating-point arithmetic, and are therefore suitable for representing things like currencies. Databases usually also provide a similar datatype, which Django's DecimalField maps to. -- DR. -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/937a5f48-60e4-498a-bd2c-f34319c81000%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
