Python | Decimal from_float() method
Last Updated :
23 May, 2022
Decimal#from_float() : from_float() is a Decimal class method which converts a float to a decimal number, exactly.
Syntax: Decimal.from_float() Parameter: Decimal values Return: converts a float to a decimal number, exactly.
Code #1 : Example for from_float() method
Python3
from decimal import *
a = Decimal( - 1 )
b = Decimal( '0.142857' )
print ("Decimal value a : ", a)
print ("Decimal value b : ", b)
print ("\n\nDecimal a with from_float() method : ", a.from_float( 0.1 ))
print ("Decimal b with from_float() method : ", b.from_float( float ( 'nan' )))
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Output :
Decimal value a : -1
Decimal value b : 0.142857
Decimal a with from_float() method : 0.1000000000000000055511151231257827021181583404541015625
Decimal b with from_float() method : NaN
Code #2 : Example for from_float() method
Python3
from decimal import *
a = Decimal( '-3.14' )
b = Decimal( '321e + 5' )
print ("Decimal value a : ", a)
print ("Decimal value b : ", b)
print ("\n\nDecimal a with from_float() method : ", a.from_float( 0.02 ))
print ("Decimal b with from_float() method : ", b.from_float( float ( '-inf' )))
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Output :
Decimal value a : -3.14
Decimal value b : 3.21E+7
Decimal a with from_float() method : 0.0200000000000000004163336342344337026588618755340576171875
Decimal b with from_float() method : -Infinity
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