python 压缩字符串长度

根据提供的引用内容，以下是一个解决方案来压缩字符串长度的Python代码示例：

def compress(chars):
    if len(chars) == 0:
        return 0
    if len(chars) == 1:
        return 1

    write = 0
    count = 1

    for read in range(1, len(chars)):
        if chars[read] == chars[read - 1]:
            count += 1
        else:
            chars[write] = chars[read - 1]
            write += 1
            if count > 1:
                for digit in str(count):
                    chars[write] = digit
                    write += 1
            count = 1

    chars[write] = chars[-1]
    write += 1
    if count > 1:
        for digit in str(count):
            chars[write] = digit
            write += 1

    return write

chars = ["a", "a", "b", "b", "c", "c", "c"]
compressed_length = compress(chars)
print("Compressed length:", compressed_length)
print("Compressed chars:", chars[:compressed_length])

这段代码使用了两个指针，`read`和`write`，以及一个计数器`count`来实现原地修改数组并压缩字符串长度。它遍历输入数组，如果当前字符与前一个字符相同，则增加计数器`count`的值；否则，将前一个字符和计数器的值写入数组中，并更新`write`指针。最后，返回`write`指针的值作为压缩后的字符串长度。