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Variable Swapping in Python
Variable Swapping in Python: Python makes it really easy to swap values of two or more variables. Example:
>>> x = 10 >>> y = 20 >>> x, y = y, x >>> y 10 >>> x 20 >>> x = 1 >>> y = 2 >>> z = 3 >>> z, y, x = x, y, z >>> z 1 >>> y 2 >>> x 3
The way this works is that the expression on the right hand side creates a new tuple. This is one of the ways that tuples can be created. The tuple thus formed gets unpacked into variables on the left hand side.