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
# Python Program explaining # from_float() method# loading decimal libraryfrom decimal import *# Initializing a decimal valuea = Decimal(-1)b = Decimal('0.142857')# printing Decimal valuesprint ("Decimal value a : ", a)print ("Decimal value b : ", b)# Using Decimal.from_float() methodprint ("\n\nDecimal a with from_float() method : ", a.from_float(0.1))print ("Decimal b with from_float() method : ", b.from_float(float('nan'))) |
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
# Python Program explaining # from_float() method# loading decimal libraryfrom decimal import *# Initializing a decimal valuea = Decimal('-3.14')b = Decimal('321e + 5')# printing Decimal valuesprint ("Decimal value a : ", a)print ("Decimal value b : ", b)# Using Decimal.from_float() methodprint ("\n\nDecimal a with from_float() method : ", a.from_float(0.02))print ("Decimal b with from_float() method : ", b.from_float(float('-inf'))) |
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
