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Angelos Chalaris
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blog_posts/python-swap-variables.md
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@ -29,7 +29,7 @@ print(b) # 11
### Without a temporary variable (Tuple swap)
Another way to swap the values of two variables, without using a temporary variable, is to use tuple packing and sequence unpacking. Tuples can be constructed in a number of ways, one of which is by separating tuple items using commas. Moreover, Python evaluates the right-hand side of an assignment before its left-hand side. So, by separating the variables with commas on the right side of the statement the variables are packed into a tuple and unpacked by placing the same number of comma-separated target variables on the left side.
Another way to swap the values of two variables, without using a temporary variable, is to use **tuple packing** and **sequence unpacking**. Tuples can be constructed in a number of ways, one of which is by separating tuple items using commas. Moreover, Python evaluates the right-hand side of an assignment before its left-hand side. So, by separating the variables with commas on the right side of the statement the variables are packed into a tuple and unpacked by placing the same number of comma-separated target variables on the left side.
This method of variable swapping and permutation can be used for more than two variables as long as the same number of variables are on both sides of the statement.