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>>> 0.1 + 0.1 + 0.1 - 0.3
5.5511151231257827e-17
>>> from decimal import Decimal
>>> def _(x): return Decimal(str(x))
...
>>> _(0.1)+_(0.1)+_(0.1)+_(-0.3)
Decimal('0.0')
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And last here is the overload operators example:
# map() takes two (or more) arguments, a function and a list to apply the function to
# lambda can be put anywhere a function is expected
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