如何实现区分字符串长度和字符串中字符的函数

string = "Hello, World!"
length = len(string)
print("字符串长度为:", length)

string = "Hello, World!"
char_count = {}

for char in string:
    if char in char_count:
        char_count[char] += 1
    else:
        char_count[char] = 1

print("字符串中每个字符出现的次数:")
for char, count in char_count.items():
    print(char, ":", count)

字符串中每个字符出现的次数:
H : 1
e : 1
l : 3
o : 2
, : 1
  : 1
W : 1
r : 1
d : 1
! : 1