String reversal (Python)

1. Overall process
In order to implement the function of recursively reversing n strings, we can follow the following steps:

step	action
1	Define recursive function
2	Determine the end condition of recursion
3	Basic case for handling recursive functions
4	Call a recursive function to recursively handle sub-problems
5	Return recursive results

I'll explain each step in detail and provide corresponding code examples.

2. Step specific operations
2.1 Define recursive function
First, we need to define a recursive function to implement the function of string reversal . This can be defined using the following code:

def reverse_string(s):
    # 递归函数的定义
    pass

2.2 Determine the end condition of recursion
In the recursive function, we need to determine the end condition of the recursion. Regarding the problem of string reversal, when the length of the string is 1, there is no need to perform the reversal operation and can be returned directly. You can use the following code to determine the end condition:

def reverse_string(s):
    if len(s) == 1:
        return s

2.3 Handling the basic case of recursive functions
When the recursion has not ended, we need to handle the basic cases of recursive functions. That is, decompose the problem into smaller sub-problems and call itself recursively to handle the sub-problems. For the problem of string reversal, you can divide the string into two parts: the first character and the remaining characters, then reverse the remaining characters and put the first character at the end. You can use the following code to handle the basic case:

def reverse_string(s):
    if len(s) == 1:
        return s
    else:
        return reverse_string(s[1:]) + s[0]

2.4 Call the recursive function to handle the sub-problem recursively
After the basic situation of the recursive function is processed, we need to call the recursive function to handle the sub-problem. For the problem of string reversal, we can reverse the remaining characters and put the first character at the end. Recursive functions can be called using the following code:

def reverse_string(s):
    if len(s) == 1:
        return s
    else:
        return reverse_string(s[1:]) + s[0]

def reverse_n_strings(strings):
    reversed_strings = []
    for s in strings:
        reversed_strings.append(reverse_string(s))
    return reversed_strings

2.5 Returning recursive results
Finally, we need to return the recursive results. For the problem of string reversal, we can store the reversed string in a list and return the list. You can use the following code to return recursive results:

def reverse_string(s):
    if len(s) == 1:
        return s
    else:
        return reverse_string(s[1:]) + s[0]

def reverse_n_strings(strings):
    reversed_strings = []
    for s in strings:
        reversed_strings.append(reverse_string(s))
    return reversed_strings

3. Code Example
Here is the complete code example:

def reverse_string(s):
    if len(s) == 1:
        return s
    else:
        return reverse_string(s[1:]) + s[0]

def reverse_n_strings(strings):
    reversed_strings = []
    for s in strings:
        reversed_strings.append(reverse_string(s))
    return reversed_strings

strings = ["hello", "world", "python"]
reversed_strings = reverse_n_strings(strings)
print(reversed_strings)

Running the above code will output the reversed string list:

['olleh', 'dlrow', 'nohtyp']