Classe « Decimal » Python 3.11.3

Méthode decimal.Decimal.from_float

Signature de la méthode from_float

def from_float(f) 

Description

help(Decimal.from_float)

Class method that converts a float to a decimal number, exactly.
Since 0.1 is not exactly representable in binary floating point,
Decimal.from_float(0.1) is not the same as Decimal('0.1').

    >>> Decimal.from_float(0.1)
    Decimal('0.1000000000000000055511151231257827021181583404541015625')
    >>> Decimal.from_float(float('nan'))
    Decimal('NaN')
    >>> Decimal.from_float(float('inf'))
    Decimal('Infinity')
    >>> Decimal.from_float(float('-inf'))
    Decimal('-Infinity')