Given a list<\/a> of size<\/a> Swap the element at index Examples:<\/strong><\/p>\n To swap two list elements by index The highlighted line works as follows: <\/p>\n To help you better understand this code snippet, I\u2019ve recorded a quick video that shows you how the generalization of multiple assignment, i.e., slice assignment<\/em>, works as a Python One-Liner<\/a>:<\/p>\nn<\/code> and two indices i,j < n<\/code>. <\/p>\ni<\/code> with the element at index j<\/code>, so that the element list[i]<\/code> is now at position j<\/code> and the original element list[j]<\/code> is now at position i<\/code>. <\/p>\n\n
0<\/code> and 2<\/code> in list [1<\/strong>, 2, 3<\/strong>]<\/code> modifies the list to [3<\/strong>, 2, 1<\/strong>]<\/code>.<\/li>\n1<\/code> and 2<\/code> in list [1, 2<\/strong>, 3<\/strong>]<\/code> modifies the list to [1, 3<\/strong>, 2<\/strong>]<\/code>.<\/li>\n1<\/code> and 3<\/code> in list ['alice', 'bob'<\/strong>, 'carl', 'denis'<\/strong>]<\/code> modifies the list to ['alice', 'denis'<\/strong>, 'carl', 'bob'<\/strong>]<\/code><\/code>.<\/li>\n<\/ul>\nMethod 1: Multiple Assignment<\/h2>\n
i<\/code> and j<\/code>, use the multiple assignment<\/a> expression lst[i], lst[j] = lst[j], lst[i]<\/code> that assigns the element at index i<\/code> to index j<\/code> and vice versa.<\/p>\nlst = ['alice', 'bob', 'carl']\ni, j = 0, 2 # Swap index i=0 with index j=2\nlst[i], lst[j] = lst[j], lst[i] print(lst)\n# ['carl', 'bob', 'alice']<\/pre>\n
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j<\/code> and i<\/code> by running the right-hand side of the assignment<\/a> operation. <\/li>\ni<\/code> and j<\/code> (see left-hand side of the assignment operation).<\/li>\n<\/ul>\n