Money does automatic conversion of floats, which is extremely unhelpful

[spookylukey]

Compare:

>>> from decimal import Decimal
>>> Decimal("2.3") * 1.2
TypeError: unsupported operand type(s) for *: 'decimal.Decimal' and 'float'

There are extremely good reasons for this behaviour, and is one of the primary reasons that you would choose to use Decimal to represent money. A decimal library must never do a lossy conversion, and I use the Python Decimal module precisely because I can rely on it to do this correctly, and throw an exception if I ever make the mistake (and it's always a mistake) of mixing floats into my decimal calculations.

With money, on the other hand:

>>> Money(amount='2.3', currency='GBP') * 1.2
>>> GBP 2.759999999999999897859481734

This behaviour is extremely surprising, and should instead raise an exception, the same one as above. In my opinion, with the current behaviour, this library is seriously flawed.

[carlospalol]

I agree. I'll raise an exception.

[carlospalol]

Fixed in 12894c9 and release 1.2.0. Removed the implicit conversion. Added note in README and left Decimal to complain.

Thanks for the report.

[spookylukey]

Awesome, thanks so much!