Clarification on the Decimal type in Python

Question

Everybody know, or at least, every programmers should know, that using the float type could lead to precision errors. However, in some cases, an exact solution

Answer 1

is there a way to have a Decimal type with an infinite precision?

No; for any non-empty interval on the real line, you cannot represent all the numbers in the set with infinite precision using a finite number of bits. This is why Fraction is useful, as it stores the numerator and denominator as integers, which can be represented precisely:

>>> Fraction("1.25")
Fraction(5, 4)