all Python 3Exceptionsexception

decimal.Inexact

module exceptions

Decimal rounding discarded non-zero digits (the result is inexact).

Syntax

raise decimal.Inexact

The trap is disabled by default: the signal just sets a flag in context.flags while the rounded result is returned as usual. You turn it on when you need to know that digits were actually lost, say that an amount did not divide evenly. Do not confuse it with Rounded, which fires whenever digits are dropped at all, even zeros; Inexact fires only when the discarded digits were non-zero.

Examples

import decimal
try:
    raise decimal.Inexact
except decimal.Inexact as e:
    print(type(e).__name__)   # → Inexact

See also

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