result = string = input请输入正整数用逗号分隔chars = stringsplitlist = charsi for i in rangelenchars for num in list if num 1 for i in range2 num if num i == 0 break

以下是可能的改进：

1. 将输入值转换为整数，以便进行比较和计算：

list = [int(chars[i]) for i in range(len(chars))]

2. 将列表推导式简化为：

list = [int(char) for char in chars]

3. 用更好的变量名替换“num”和“list”，以增加代码可读性：

numbers = [int(char) for char in chars]

4. 将“pass”删除，因为它不需要执行任何操作：

if num > 1:
    for i in range(2, num):
        if (num % i) == 0:
            break
    else:
        result.append(num)

5. 将结果打印到一行中，以便于查看和输出：

print("素数：", end="")
for i in result:
    print(i, end=" ")

整个改进后的代码如下：

result = []
string = input("请输入正整数，用逗号分隔")
chars = string.split(",")
numbers = [int(char) for char in chars]
for num in numbers:
    if num > 1:
        for i in range(2, num):
            if (num % i) == 0:
                break
        else:
            result.append(num)
    else:
        pass
print("素数：", end="")
for i in result:
    print(i, end=" ")
``