In the tutorials, it said that python language cannot store decimals perfectly ,such as 1/3 as it "MAY LEAD TO INFURIATING BUGS"

Question

How will this lead to bugs ?? can someone explain ?

Answer 1

Generating a big decimal number, like for example Pi, will take a lot of power to get the exact number up to example 1000 numbers. If Python was trying to be exact it would open a gap in time, energy and memory, This makes an opportunity for bugs, or other programs to influence Python, making it less efficient.
I might be wrong on this, but that would be my biggest worry as a programmer.