题解 | #字符个数统计#
字符个数统计
http://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
python 获取ASCII码的函数 ord（）
a = [0]*128
s = 0
for i in range(len(ss)):
if ord(ss[i])<=127 and ord(ss[i])>=0:
a[ord(ss[i])] = 1
for i in range(len(a)):
if a[i]!=0:
s = s+1
print(s)
