Reverse every 3 characters in a Python string.

You can use slicing and stride to achieve the functionality of reversing every 3 characters in a string. Here is an example code:

def reverse_string(s):
    # 使用切片和步长3来每隔3个字符翻转字符串
    return s[::-3]

# 测试示例
s = "abcdefghijk"
reversed_s = reverse_string(s)
print(reversed_s)

The output is “kjigecba”