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This article mainly introduces the relevant knowledge of "what are the methods of Python string inversion". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "what are the methods to achieve Python string inversion" can help you solve the problem.

Method 1: symmetrical exchange method

Description: traverses the elements in the first half of the string and then swaps with the elements in the symmetrical position in the second half to achieve string inversion.

Method 2: function recursion method

Description: use the idea of recursion to establish a function and add a string in reverse order until the string length is less than or equal to 1.

Method 3: list reversal method

Description: in Python, the list can be reversed, we just need to convert the string into a list, use the reverse () method, reverse, and then use the string's join () method to traverse the list and merge into a single string.

Method 4: cyclic reverse iteration method

Description: string is a kind of sequence, we can use for loop to traverse the string, and then, constantly reverse the assignment to the variable str2, and finally output the variable str2, which completes the string inversion.

Method 5: reverse order slice method

Description: the use of slicing characteristics, one step in place.

Method 6: traversal index method

Description: strings as a sequence can be indexed, so we first traverse the index numbers, then extract letters in reverse order, and then merge into strings.

Method 7: reverse traversal index method

Description: the range () function has three parameters: start,end,step, and left closed and right open, we start from the last index, the beginning of the index ends, traverse the index in reverse order, then reverse extract the string, and finally merge.

Method 8: list pop-up method

Description: there is a pop-up method pop () in the list, and the last element pops up by default. Each pop-up element is added to the empty string newStr, resulting in the inversion of the original string.

Method 9: reverse cycle iteration method

Improvements:

Description: use a list parser, and then reverse the merged string through the join () method.

Method 10: cumulative addition

Description: use the reduce () function in python. First create a string reverse addition function, then pass the string and the newly created function into the reduce () function, add the string reverse accumulation, and finally reverse the string.

Method 11: anonymous function method

Description: the advanced version of method 10, use the lambda anonymous function to create a string reverse addition function, and then accumulate and add to get the string inversion result.

Method 12: list reverse method

Description: using the list of sort (reverse=True) method, descending order, however, this method has a drawback, it is not by the ascending or descending order of strings, but by the "ASCII character order" to sort, so, if the string is not sorted from small to large, then after running, sorting will be wrong.

Method 13: bi-directional queue sorting method

Description: traverse the string, add it to the left and add it to the two-way queue, and finally use the join () method to merge to achieve string inversion.

Method 14: two-way queue inversion method

Description: also use a two-way queue, convert the string into a list and add it to the queue, and then reverse the whole, using the join () method to merge to achieve string inversion

This is the end of the introduction on "what are the methods for implementing Python string inversion". Thank you for your reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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