Python, these numbers are presented as a floating-pointing numbers and thus are not 100% precise.

When you work with floating-point numbers, don't forget that in Python, these numbers are presented as a floating-pointing numbers and thus are not 100% precise.

The real descrepancy is quite small for daily-life applications, but when you compare two such numbers, do not compare them using the "==". When you have two close floating-point numbers, consider them equal if they are close enough to each other. You can assume that if the difference between the two numbers is less than 1E-15 fraction of their value, then the numbers are equal. Everything smaller than this is an error of representing the number as a "float" or "double".

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